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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2017-02-27</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001660734</issuerCik>
        <issuerName>Triton International Ltd</issuerName>
        <issuerTradingSymbol>TRTN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001692221</rptOwnerCik>
            <rptOwnerName>Bharti Global Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1ST FLOOR, LE MASURIER HOUSE</rptOwnerStreet1>
            <rptOwnerStreet2>LA RUE LE MASURIER</rptOwnerStreet2>
            <rptOwnerCity>ST. HELIER</rptOwnerCity>
            <rptOwnerState>Y9</rptOwnerState>
            <rptOwnerZipCode>JE2 4YE</rptOwnerZipCode>
            <rptOwnerStateDescription>JERSEY</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001692539</rptOwnerCik>
            <rptOwnerName>Bharti Overseas Private Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>BHARTI CRESCENT, 1, NELSON MANDELA ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>VASANT KUNJ, PHASE -2</rptOwnerStreet2>
            <rptOwnerCity>NEW DELHI</rptOwnerCity>
            <rptOwnerState>K7</rptOwnerState>
            <rptOwnerZipCode>110070</rptOwnerZipCode>
            <rptOwnerStateDescription>INDIA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7877590</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On February 27, 2017, 7,877,590 Common Shares of Triton International Limited, a Bermuda exempted company (the &quot;Issuer&quot;) were transferred to Bharti Global Limited, a private limited company formed under the laws of Jersey (&quot;BGL&quot;), through a pro rata distribution to a wholly-owned subsidiary of BGL and series of transactions among wholly-owned subsidiaries of BGL in reliance upon exemptions from registration under the Securities Act of 1933, as amended.</footnote>
        <footnote id="F2">Bharti Overseas Private Limited, a private limited company formed under the laws of India (&quot;BOPL&quot;, and together with BGL, the &quot;Reporting Persons&quot;) is the sole shareholder of BGL, which directly holds 7,877,590 Common Shares of the Issuer. Because of BOPL's relationship to BGL, BOPL may be deemed to beneficially own the Common Shares of the Issuer held directly by BGL.</footnote>
        <footnote id="F3">Pursuant to Rule 16a-1(a)(4) of the Exchange Act of 1934, as amended (the &quot;Exchange Act&quot;), BOPL herein states that this Form 3 shall not be deemed an admission that it is the beneficial owner of any of the Common Shares of the Issuer reported in this Form 3. BOPL disclaims beneficial ownership of the Common Shares of the Issuer, except to the extent of its pecuniary interest in such Common Shares.</footnote>
        <footnote id="F4">Information with respect to each Reporting Person is given solely by such Reporting Person, and neither of the Reporting Persons has responsibility for the accuracy or completeness of information supplied by the other Reporting Person.</footnote>
        <footnote id="F5">Solely for the purposes of Section 16 of the Exchange Act, each of BGL and BOPL may be deemed a director-by-deputization by virtue of the contractual right of a shareholder group of which BGL is a party to to appoint one or more directors to the board of directors of the Issuer pursuant to that certain Sponsor Shareholders Agreement (Warburg Pincus), among the Issuer, BGL and the other shareholders party thereto, dated as of November 9, 2015 (as amended).</footnote>
    </footnotes>

    <remarks>(6) The Reporting Persons are jointly filing this Form 3 pursuant to Rule 16a-3(j) under the Exchange Act.</remarks>

    <ownerSignature>
        <signatureName>/s/ SONAL KAPASI, Authorized Signatory, Bharti Global Limited (6)</signatureName>
        <signatureDate>2017-02-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ PUNEET TANDON, Authorized Signatory, Bharti Overseas Private Limited (6)</signatureName>
        <signatureDate>2017-02-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
