Company: MYI
Filing Date: 2025-09-05
Form Type: 424B3
Source: 0001193125-25-196285
Chunk: 265

Company: BLACKROCK MUNIYIELD QUALITY FUND III, INC.
Filing Date: 2025-09-05
Form: 424B3
Chunk 265
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 |       N/A |    |     |            |       N/A |    |
| Portfolio turnover rate                                                                  |     |             |      10 | %    |     |            |      24 | %  |     |            |      49 | %    |     |            |      15 | %  |     |            |         5 | %  |     |            |        18 | %  |

| (a) | Based on average Common Shares outstanding. |

| (b) | Distributions for annual periods determined in accordance with U.S. federal income tax regulations. |

| (c) | A portion of the distributions from net investment income may be deemed a return of capital or net realized 
 gain at fiscal year-end.                                                                                    |

157

| (d) | Amount is less than $0.005 per share. |

| (e) | Total returns based on market price, which can be significantly greater or less than the net asset value, may                                                                       
 result in substantially different returns. Where applicable, excludes the effects of any sales charges and assumes the reinvestment of distributions at actual reinvestment prices. |

| (f) | Not annualized. |

| (g) | Excludes fees and expenses incurred indirectly as a result of investments in underlying funds. |

| (h) | Annualized. |

| (i) | Interest expense, fees and amortization of offering costs related to TOB Trusts and/or VRDP Shares. See Note 
 4 and Note 10 of the Notes to Financial Statements for details.                                              |

| (j) | The total expense ratio after fees waived and/or reimbursed and excluding interest expense, fees, 
 amortization of offering costs, reorganization costs, liquidity and remarketing fees as follows:  |

|                |     | Six Months  
 Ended       
 01/31/25    
 (unaudited) |      |   |     | Year Ended 
 07/31/24   |      |   |     | Year Ended 
 07/31/23   |      |   |     | Year Ended 
 07/31/22   |      |   |     | Year Ended 
 07/31/21   |      |   |     | Year Ended 
 07/31/20   |      |   |
| Expense ratios |     |             | 0.80 | % |     |            | 0.83 | % |     |            | 0.