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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-09-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001561921</issuerCik>
        <issuerName>TELA Bio, Inc.</issuerName>
        <issuerTradingSymbol>TELA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001746777</rptOwnerCik>
            <rptOwnerName>EW HEALTHCARE PARTNERS FUND 2, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>21 WATERWAY AVENUE, SUITE 225</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>THE WOODLANDS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77380</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>See footnote 2</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001746779</rptOwnerCik>
            <rptOwnerName>EW HEALTHCARE PARTNERS FUND 2-A, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>21 WATERWAY AVENUE, SUITE 225</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>THE WOODLANDS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77380</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>See footnote 2</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001793943</rptOwnerCik>
            <rptOwnerName>EW Healthcare Partners Fund 2 GP, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>21 WATERWAY AVENUE, SUITE 225</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>THE WOODLANDS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77380</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001793948</rptOwnerCik>
            <rptOwnerName>EW Healthcare Partners Fund 2-UGP, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>21 WATERWAY AVENUE, SUITE 225</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>THE WOODLANDS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77380</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2021-09-13</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>115</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>12.43</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1812048</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</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>2021-09-14</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>12.27</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1822048</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares shown above were the aggregate amounts of shares purchased by EW Healthcare Partners Fund 2, L.P. (&quot;Fund 2&quot;) and EW Healthcare Partners Fund 2-A, L.P. (&quot;Fund 2-A&quot;) on the dates set forth above. Fund 2 purchased 3,930 shares of the amount shown above on September 14, and Fund 2-A purchased 115 shares and 6,070 shares of the amounts shown above on September 13 and 14, respectively. Fund 2 now holds a total of 757,115 shares and Fund 2-A now holds a total of 1,064,933 shares of the Issuer.</footnote>
        <footnote id="F2">EW Healthcare Partners Fund 2 GP, L.P. (the &quot;EW Funds GP&quot;), is the general partner of each of EW Healthcare Partners Fund 2, L.P. (&quot;Fund 2'&quot;) and EW Healthcare Partners Fund 2-A, L.P. (''EW Fund 2-A&quot; and together with EW Fund 2, the ''EW Funds&quot;). EW Healthcare Partners Fund 2- UGP, LLC (the &quot;General Partner&quot;) is the general partner of EW Funds GP. The General Parmer holds sole voting and dispositive power over the shares held by each of the EW Funds (the &quot;Shares''). The managers of the General Parmer are Martin P. Sutter, Ron Eastman, Scott Bany and Petri Vainio (collectively, the ''Managers'') and may exercise voting and investment control over the Shares only by majority action of the Managers. Each individual Manager, the EW Funds GP and the General Partner disclaims beneficial ownership over the Shares except to the extent of his or its respective pecuniary interest therein.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>EW HEALTHCARE PARTNERS FUND 2, L.P., By: EW Healthcare Partners Fund 2 GP, L.P., its General Partner, By: EW Healthcare Partners Fund 2-UGP, LLC, its General Partner, By: Martin P. Sutter, Attorney-in-Fact, /s/ Martin P. Sutter</signatureName>
        <signatureDate>2021-09-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>EW HEALTHCARE PARTNERS FUND 2-A, L.P., By: EW Healthcare Partners Fund 2 GP, L.P., its General Partner, By: EW Healthcare Partners Fund 2-UGP, LLC, its General Partner, By: Martin P. Sutter, Attorney-in-Fact, /s/ Martin P. Sutter</signatureName>
        <signatureDate>2021-09-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>EW HEALTHCARE PARTNERS FUND 2 GP, L.P., By: EW Healthcare Partners Fund 2-UGP, LLC, its General Partner, By: Martin P. Sutter, Attorney-in-Fact, /s/ Martin P. Sutter</signatureName>
        <signatureDate>2021-09-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>EW HEALTHCARE PARTNERS FUND 2-UGP, LLC, By: Martin P. Sutter, Attorney-in-Fact, /s/ Martin P. Sutter</signatureName>
        <signatureDate>2021-09-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
