<SEC-DOCUMENT>0001741773-25-001663-index.html : 20250429
<SEC-HEADER>0001741773-25-001663.hdr.sgml : 20250429
<ACCEPTANCE-DATETIME>20250429091246
ACCESSION NUMBER:		0001741773-25-001663
CONFORMED SUBMISSION TYPE:	497K
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20250429
DATE AS OF CHANGE:		20250429
EFFECTIVENESS DATE:		20250429

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MFS VARIABLE INSURANCE TRUST III
		CENTRAL INDEX KEY:			0001065698
		ORGANIZATION NAME:           	
		EIN:				000000000
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		497K
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-59093
		FILM NUMBER:		25883016

	BUSINESS ADDRESS:	
		STREET 1:		111 HUNTINGTON AVENUE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02199
		BUSINESS PHONE:		617-954-5000

	MAIL ADDRESS:	
		STREET 1:		111 HUNTINGTON AVENUE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02199

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SUN CAPITAL ADVISERS TRUST
		DATE OF NAME CHANGE:	19980709
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0001065698
<SERIES-ID>S000018843
<SERIES-NAME>MFS Mid Cap Value Portfolio
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000052149
<CLASS-CONTRACT-NAME>Initial Class
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000052150
<CLASS-CONTRACT-NAME>Service Class
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497K
<SEQUENCE>1
<FILENAME>c497k.htm
<TEXT>
Document 1 - file: c497k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>img_301686b83e324f1.jpg
<TEXT>
Document 2 - file: img_301686b83e324f1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>img_ed322695e1074f1.jpg
<TEXT>
Document 3 - file: img_ed322695e1074f1.jpg

</DOCUMENT>
</SEC-DOCUMENT>