SUPPLEMENT DATED NOVEMBER 15, 2010

TO

PROSPECTUSES DATED APRIL 30, 2010

FOR SUN LIFE FINANCIAL MASTERS ACCESS, SUN LIFE FINANCIAL MASTERS EXTRA,

SUN LIFE FINANCIAL MASTERS CHOICE, AND SUN LIFE FINANCIAL MASTERS FLEX

ISSUED BY SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F

This supplement contains information about the SCSM Ibbotson Moderate Fund that is available under your Contract.

Effective November 15, 2010, SCSM Ibbotson Moderate Fund’s name has been changed to SCSM Ibbotson Conservative Fund and all references to the SCSM Ibbotson Moderate Fund in each of the above referenced prospectuses are hereby changed from “SCSM Ibbotson Moderate Fund” to “SCSM Ibbotson Conservative Fund.”

THIS SUPPLEMENT SHOULD BE READ AND RETAINED FOR FUTURE REFERENCE.

Masters (US)                                                                                                                                          2010