<SEC-DOCUMENT>0001770991-20-000012.txt : 20201116
<SEC-HEADER>0001770991-20-000012.hdr.sgml : 20201116
<ACCEPTANCE-DATETIME>20201116145508
ACCESSION NUMBER:		0001770991-20-000012
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20201113
FILED AS OF DATE:		20201116
DATE AS OF CHANGE:		20201116

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Onderdonk Keith P
		CENTRAL INDEX KEY:			0001658711

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14222
		FILM NUMBER:		201315805

	MAIL ADDRESS:	
		STREET 1:		C/O SUBURBAN PROPANE
		STREET 2:		240 ROUTE 10 WEST
		CITY:			WHIPPANY
		STATE:			NJ
		ZIP:			07981

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SUBURBAN PROPANE PARTNERS LP
		CENTRAL INDEX KEY:			0001005210
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-MISCELLANEOUS RETAIL [5900]
		IRS NUMBER:				223410353
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0925

	BUSINESS ADDRESS:	
		STREET 1:		P O BOX 206
		STREET 2:		240 ROUTE 10 WEST
		CITY:			WIPPANY
		STATE:			NJ
		ZIP:			07981
		BUSINESS PHONE:		9738875300

	MAIL ADDRESS:	
		STREET 1:		ONE SUBURBAN PLZ
		STREET 2:		240 RTE 10 WEST
		CITY:			WHIPPANY
		STATE:			NJ
		ZIP:			07981
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-11-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001005210</issuerCik>
        <issuerName>SUBURBAN PROPANE PARTNERS LP</issuerName>
        <issuerTradingSymbol>SPH</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001658711</rptOwnerCik>
            <rptOwnerName>Onderdonk Keith P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SUBURBAN PROPANE</rptOwnerStreet1>
            <rptOwnerStreet2>240 ROUTE 10 WEST</rptOwnerStreet2>
            <rptOwnerCity>WHIPPANY</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07981</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP, Operational Support</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Units (representing limited partnership interests)</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4653</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>16.65</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>37959</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Units (representing limited partnership interests)</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>18072</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>56031</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents filer's payment of tax liability in connection with the vesting of previously granted restricted units by means of Issuer's withholding of Common Units in accordance with the provisions of Issuer's restricted unit plan and SEC Rule 16b-3.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Bryon Koepke, by power of attorney</signatureName>
        <signatureDate>2020-11-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
