6-K

UNITEDSTATES

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

FORM 6-K****

Report of Foreign Private IssuerPursuant to Rule 13a-16 or 15d-16under the Securities Exchange Act of 1934

SUN LIFE FINANCIAL INC.

(the "Company")

(Translation of registrant's name into English)

1York Street, 31st Floor, Toronto, Ontario, M5J 0B6

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Indicate by check mark if the registrant is submitting the Form 6-K  in paper as permitted by Regulation S-T Rule 101(b)(1):____

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):____

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Exhibit 99.1

****

Sun Life declares dividends on Common and Preferred Shares payable in Q3 2020

TORONTO, Aug. 6, 2020 /CNW/ - The Board of Directors (the "Board") of Sun Life Financial Inc. (the "Company") (TSX: SLF) (NYSE: SLF) today announced that a dividend of $0.55 per share on the common shares of the Company has been declared, payable September 30, 2020 to shareholders of record at the close of business on August 26, 2020. This is the same amount as paid in the previous quarter.

The Board also announced that the following dividends have been declared on the Company's Class A Non-Cumulative Preferred Shares, payable on September 30, 2020 to shareholders of record at the close of business on August 26, 2020:

Common shares of the Company acquired under the Company's Canadian Dividend Reinvestment and Share Purchase Plan (the "Plan") will be purchased by the Plan agent on the open market through the facilities of the Toronto Stock Exchange and through the facilities of other Canadian stock exchanges and alternative Canadian trading platforms.

Sun Life Financial Inc. has designated the dividends referred to above as eligible dividends for the purposes of the Income Tax Act (Canada).

About Sun LifeSun Life is a leading international financial services organization providing insurance, wealth and asset management solutions to individual and corporate Clients. Sun Life has operations in a number of markets worldwide, including Canada, the United States, the United Kingdom, Ireland, Hong Kong, the Philippines, Japan, Indonesia, India, China, Australia, Singapore, Vietnam, Malaysia and Bermuda. As of June 30, 2020, Sun Life had total assets under management of $1,122 billion. For more information, please visit www.sunlife.com.

Sun Life Financial Inc. trades on the Toronto (TSX), New York (NYSE) and Philippine (PSE) stock exchanges under the ticker symbol SLF.

Note to editors: All figures in Canadiandollars

View original content to download multimedia:http://www.prnewswire.com/news-releases/sun-life-declares-dividends-on-common-and-preferred-shares-payable-in-q3-2020-301108074.html

SOURCE Sun Life Financial Inc.

View original content to download multimedia: http://www.newswire.ca/en/releases/archive/August2020/06/c7186.html

%CIK: 0001097362

CO: Sun Life Financial Inc.

CNW 17:02e 06-AUG-20