Company: MYI
Filing Date: 2025-08-08
Form Type: PRE 14A
Source: 0001193125-25-176952
Chunk: 3

Company: BLACKROCK MUNIYIELD QUALITY FUND III, INC.
Filing Date: 2025-08-08
Form: PRE 14A
Chunk 3
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 of the Special Meeting. To register, you must submit proof of your proxy power (legal proxy), which you can obtain from your financial intermediary or other nominee, reflecting your Fund holdings along with your name and email address to Georgeson LLC, each Fund’s tabulator. You may email an image of your legal proxy to shareholdermeetings@computershare.com. Requests for registration must be received no later than 5:00 p.m. (Eastern Time) three business days prior to the Special Meeting date. You will receive a confirmation email from Georgeson LLC of your registration and a control number and security code that will allow you to vote at the Special Meeting. Even if you plan to attend the Special Meeting, please promptly follow the enclosed instructions to submit voting instructions by telephone or via the Internet. Alternatively, you may submit voting instructions by signing and dating each proxy card or voting instruction form you receive, and if received by mail, returning it in the accompanying postage-paid return envelope. We encourage you to carefully review the enclosed materials, which explain the proposals in more detail. As a shareholder, your vote is important, and we hope that you will respond today to ensure that your shares will be represented at the meeting. You may vote using one of the methods below by following the instructions on your proxy card or voting instruction form(s):

| ● |     | By touch-tone phone; |

| ● |     | By internet; |

| ● |     | By signing, dating and returning the enclosed proxy card or voting instruction form(s) in the postage-paid 
 envelope; or                                                                                               |

| ● |     | By participating at the Special Meeting as described above. |

If you do not vote using one of the methods described above, you may be called by Georgeson LLC, the Funds’ proxy solicitor, to vote your shares. If you have any questions about the proposals to be voted on or the virtual Special Meeting, please call Georgeson LLC, the firm assisting us in the solicitation of proxies, toll free at 1-888-686-6309. As always, we appreciate your support. Sincerely, - 3 -

JOHN M. PERLOWSKI

President and Chief Executive Officer of the Funds

Please vote now. Your vote is important.

To avoid the wasteful and unnecessary expense of further solicitation(s), we urge you to indicate your voting instructions on the enclosed proxy card, date and sign it and return it promptly in the postage-paid envelope provided, or record your voting instructions by telephone or via