# EDGAR Filing Document

**Accession Number:** 0001065698
**File Stem:** 0000912938-26-000520
**Filing Date:** 2026-5
**Character Count:** 4255
**Document Hash:** cecf6d21d09705ef7fac015d2c9a4ec1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000912938-26-000520.hdr.sgml**: 20260505

**ACCESSION NUMBER**: 0000912938-26-000520

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260505

**DATE AS OF CHANGE**: 20260505

**EFFECTIVENESS DATE**: 20260505

**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:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-59093
- **FILM NUMBER:** 26941009

**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

### MFS Global Real Estate Portfolio (Series ID: S000008069)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000021901 | Initial Class |  |
| C000021902 | Service Class |  |

### MFS Blended Research Small Cap Equity Portfolio (Series ID: S000008071)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000021905 | Initial Class |  |
| C000021906 | Service Class |  |

### MFS Mid Cap Value Portfolio (Series ID: S000018843)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000052149 | Initial Class |  |
| C000052150 | Service Class |  |

### MFS Limited Maturity Portfolio (Series ID: S000018844)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000052151 | Initial Class |  |
| C000052152 | Service Class |  |

### MFS Conservative Allocation Portfolio (Series ID: S000023371)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000068440 | Initial Class |  |
| C000068441 | Service Class |  |

### MFS Moderate Allocation Portfolio (Series ID: S000023372)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000068442 | Initial Class |  |
| C000068443 | Service Class |  |

### MFS Growth Allocation Portfolio (Series ID: S000023373)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000068444 | Initial Class |  |
| C000068445 | Service Class |  |

### MFS New Discovery Value Portfolio (Series ID: S000023374)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000068446 | Initial Class |  |
| C000068447 | Service Class |  |

### MFS Inflation-Adjusted Bond Portfolio (Series ID: S000023378)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000068454 | Initial Class |  |
| C000068455 | Service Class |  |

#### 111 Huntington Avenue, Boston, Massachusetts 02199

#### 617-954-5000
May 5, 2026

#### VIA EDGAR
United States Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

 **Re: MFS<sup>®</sup> Variable Insurance Trust III (the "Trust") (File Nos. 333-59093 and 811-08879) on behalf of MFS<sup>®</sup> Blended Research<sup>®</sup> Small Cap Equity Portfolio, MFS<sup>®</sup> Conservative Allocation Portfolio, MFS<sup>®</sup> Global Real Estate Portfolio, MFS<sup>®</sup> Growth Allocation Portfolio, MFS<sup>®</sup> Inflation-Adjusted Bond Portfolio, MFS<sup>®</sup> Limited Maturity Portfolio, MFS<sup>®</sup> Mid Cap Value Portfolio, MFS<sup>®</sup> Moderate Allocation Portfolio, and MFS<sup>®</sup> New Discovery Value Portfolio (the "Funds")** 

Ladies and Gentlemen:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, please accept this letter on behalf of the Trust as certification that the Prospectuses and the Statement of Additional Information for the Funds do not differ from those contained in Post-Effective Amendment No. 61 (the "Amendment") to the Trust's Registration Statement on Form N-1A. The Amendment was filed electronically on April 29, 2026.

Please call the undersigned at (617) 954-5843 or Jonathan Umana-Oliveira at (617) 954-5153 with any questions you may have.

Sincerely,

/s/BRIAN E. LANGENFELD

Brian E. Langenfeld

Vice President and Managing Counsel

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