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

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-09-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001286131</issuerCik>
        <issuerName>STONEMOR PARTNERS LP</issuerName>
        <issuerTradingSymbol>STON</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001289128</rptOwnerCik>
            <rptOwnerName>McCown George Edwin</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>525 MIDDLEFIELD ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 210</rptOwnerStreet2>
            <rptOwnerCity>MENLO PARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94025</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Units representing limited partnership interests</value>
            </securityTitle>
            <transactionDate>
                <value>2004-09-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>551250</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.53</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>13532</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Units representing limited partnership interests</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">In connection with the initial public offering of common units of the Issuer, the underwriters have exercised their over-allotment option to purchase an additional 551,250 common units from the Issuer (the &quot;Over-Allotment Purchase&quot;) which closed on September 23, 2004.  Pursuant to the terms of the Issuer's First Amended and Restated Agreement of Limited Partnership, 50% of the proceeds from the Over-Allotment Purchase were used to redeem 551,250 common units owned by CFSI LLC, a Delaware limited liability company (&quot;CFSI&quot;).</footnote>
        <footnote id="F2">These securities are held directly by CFSI.  McCown De Leeuw &amp; Co. IV, L.P., a California limited partnership (&quot;MDCIV&quot;), McCown De Leeuw &amp; Co. IV Associates, L.P., a California limited partnership (&quot;MDCIVA&quot;) and Delta Fund LLC, a California limited liability company (&quot;Delta&quot; and, collectively with MDCIV and  MDCIVA, the &quot;MDC Funds&quot;) collectively control CFSI.  The MDC Funds also collectively control Cornerstone Family Services LLC, a Delaware limited liability company (&quot;CFS&quot;) that has an equity interest in CFSI.  MDC Management Company IV, LLC, a California limited liability company (&quot;MDC Management&quot;),  is the general partner of MDCIV and MDCIVA and, as such, controls MDCIV and MDCIVA.  George E. McCown, Robert B. Hellman, Jr. and David E. De Leeuw are managing directors of MDC Management and, as such, collectively control MDC Management.</footnote>
        <footnote id="F3">CFSI, MDCIV, MDCIVA, Delta, CFS, MDC Management, Mr. De Leeuw and Mr. Hellman file Section 16 reports separately from Mr. McCown.  Mr. McCown disclaims beneficial ownership of the securities reported herein except to the extent of his pecuniary interest therein.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>George E. McCown</signatureName>
        <signatureDate>2004-09-23</signatureDate>
    </ownerSignature>
</ownershipDocument>

