Company: SLFQF
Filing Date: 2025-02-13
Form Type: 40-F
Source: 0001097362-25-000008
Chunk: 4

Company: SUN LIFE FINANCIAL INC
Filing Date: 2025-02-13
Form: 40-F
Chunk 4
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 Exhibit 99.3 .

A copy of the current Sun Life Financial Code of Conduct is attached hereto as Exhibit 99.8 and available on our website at www.sunlife.com under “About Us”.

In 2024, the Company updated its Code of Conduct to reinforce its key principles and values while providing enhanced guidance and clarification to employees and the Board. Key revisions include: a new section on the Company’s culture to clarify expectations and help build awareness of the Company’s values; emphasis on the importance of cooperating with investigations; enhanced content on human rights, sustainability, and diversity, equity & inclusion; clarification on guidelines for appropriate outside activities and employment, including political contributions; the reinforcement of the Company’s requirement to only use approved communication channels and applications to conduct business or transmit Company information, including on mobile devices; and added content on security and integrity, including foreign interference.

#### Principal Accountant Fees and Services
The information about aggregate fees billed to us by our principal accountant, Deloitte LLP, under the headings “Principal Accountant Fees and Services” in the Company’s 2024 AIF is incorporated by reference herein.

A copy of the Company’s 2024 AIF is attached hereto as Exhibit 99.3 .

Comparison with New York Stock Exchange Governance Rules

The Company’s governance processes and practices are consistent with the New York Stock Exchange corporate governance rules for U.S. publicly-listed companies.

### UNDERTAKING
Registrant undertakes to make available, in person or by telephone, representatives to respond to inquiries made by the Commission staff, and to furnish promptly, when requested to do so by the Commission staff, information relating to: the securities registered pursuant to Form 40-F; the securities in relation to which the obligation to file an annual report on Form 40-F arises; or transactions in said securities.

### CONSENT TO SERVICE OF PROCESS
The Company has previously filed a Form F-X in connection with the class of securities in relation to which the obligation to file this annual report on Form 40-F arises. Any change to the name or address of the Company’s agent for service of process shall be communicated promptly to the Securities and Exchange Commission by an amendment to the Form F-X referencing the file number of the relevant registration statement of the Company.

### SIGNATURES
Pursuant to the requirements of the Exchange Act, the Registrant certifies that it meets all of the requirements for filing on Form 40-F and has duly caused this annual report to be signed on its behalf by the