<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2014-04-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001509892</issuerCik>
        <issuerName>Garrison Capital Inc.</issuerName>
        <issuerTradingSymbol>GARS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001523388</rptOwnerCik>
            <rptOwnerName>Stuart Steven Scott</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1290 AVENUE OF THE AMERICAS, SUITE 914</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10104</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2014-04-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>81581</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>520776</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2014-04-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>43022</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>274631</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2014-04-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>71321</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>455298</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2014-04-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>45686</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>291643</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2014-04-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>28109</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>179436</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F6"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2014-04-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>330281</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2108396</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11382</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F8"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7750</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F9"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1261</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F10"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4079</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F11"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>340801</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F12"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>581907</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F13"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>67202</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F14"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates indirectly serves as investment adviser to GSOF-SP LLC. Due to his control and ownership interest in GSOF-SP LLC, which directly owns 520,776 shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the members of GSOF-SP LLC. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F2">Mr. Stuart has a pecuniary interest in 6,344 of the shares of Common Stock of the Issuer being sold in these transactions, which involve the sale of an aggregate of 600,000 shares of Common Stock of the Issuer in a block trade to accounts managed by a large institutional investor with existing holdings in the Issuer.</footnote>
        <footnote id="F3">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates indirectly serves as investment adviser to GSOF-SP II LLC. Due to his control and ownership interest in GSOF-SP II LLC, which directly owns 274,631 shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the members of GSOF-SP II LLC. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F4">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates indirectly serves as investment adviser to GSOF-SP DB LLC. Due to his control and ownership interest in GSOF-SP DB LLC, which directly owns 455,298 shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the members of GSOF-SP DB LLC. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F5">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates indirectly serves as investment adviser to GSOF LLC. Due to his control and ownership interest in GSOF LLC, which directly owns 291,643 shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the members of GSOF LLC. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F6">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates indirectly serves as investment adviser to GSOIF Corporate Loan Pools Ltd. Due to his control and ownership interest in GSOIF Corporate Loan Pools Ltd., which directly owns 179,436 shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the limited partners of the sole shareholder of GSOIF Corporate Loan Pools Ltd. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F7">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates indirectly serves as investment adviser to GCOH SubCo 2014-1 LLC. Due to his control and ownership interest in GCOH SubCo 2014-1 LLC, which directly owns 2,108,396 shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the limited partners of the sole shareholder of GCOH SubCo 2014-1 LLC. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F8">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates indirectly serves as investment adviser to GCOH SubCo 2014-2 LLC. Due to his control and ownership interest in GCOH SubCo 2014-2 LLC, which directly owns 11,382 shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the limited partners of the sole shareholder of GCOH SubCo 2014-2 LLC. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F9">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates indirectly serves as investment adviser to GSOF 2014 LLC. Due to his control and ownership interest in GSOF 2014 LLC, which directly owns 7,750 shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the limited partners of the sole shareholder of GSOF 2014 LLC. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F10">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates indirectly serves as investment adviser to GSOF-SP II 2014 LLC. Due to his control and ownership interest in GSOF-SP II 2014 LLC, which directly owns 1,261shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the limited partners of the sole shareholder of GSOF-SP II 2014 LLC. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F11">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates indirectly serves as investment adviser to GSOF-SP 2014 LLC. Due to his control and ownership interest in GSOF-SP 2014 LLC, which directly owns 4,079 shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the limited partners of GSOF-SP 2014 LLC. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F12">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates serves as investment adviser to Garrison Capital Fairchild I, Ltd. Due to his control and ownership interest in Garrison Capital Fairchild I, Ltd., which directly owns 340,801 shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the limited partners of Garrison Capital Fairchild I, Ltd. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F13">Mr. Stuart is a control person of Garrison Investment Group LP and its affiliates. Garrison Investment Group LP or one of its affiliates serves as investment adviser to Garrison Capital Fairchild II Ltd. Due to his control and ownership interest in Garrison Capital Fairchild II Ltd., which directly owns 581,907 shares of Common Stock of the Issuer, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity although voting rights to the Common Stock have been passed through to the limited partners of the sole shareholder of Garrison Capital Fairchild II Ltd. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F14">Due to his control and ownership interest in Garrison Capital Advisers Holdings MM LLC, Mr. Stuart may be viewed as having investment power over all of the shares owned by such entity. Mr. Stuart disclaims beneficial ownership of such shares of Common Stock held by Garrison Capital Advisers Holdings MM LLC, except to the extent of his pecuniary interest therein.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Steven Stuart</signatureName>
        <signatureDate>2014-04-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
