Tidal Trust III

234 West Florida Street, Suite 700

Milwaukee, WI 53204

September 11, 2026

VIA EDGAR TRANSMISSION

U.S. Securities and Exchange Commission (the “Commission”)

Division of Investment Management

100 F Street, N.E.

Washington, DC 20549

To the Commission:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, and the regulations thereunder, the Trust on behalf of its series, the VistaShares Shield^TM S&P 500 Enhanced Protection ETF, VistaShares Shield^TM International Enhanced Protection ETF, VistaShares Shield^TM Emerging Markets Enhanced Protection ETF, VistaShares Shield^TM US Small Cap Enhanced Protection ETF, VistaShares Shield^TM Nasdaq 100 Enhanced Protection ETF, VistaShares Shield^TM Diversified Equity Enhanced Protection ETF, VistaShares Shield^TM Diversified Commodities Enhanced Protection ETF, and VistaShares Shield^TM Diversified Income Enhanced Protection ETF, hereby certifies that the forms of Prospectus and Statement of Additional Information that would have been filed under Rule 497(b) or (c) would not have differed from that contained in the most recent amendment effective September 9, 2026, and filed electronically as Post-Effective Amendment No. 203 to the Trust’s Registration Statement on Form N-1A on September 9, 2026.

If you have any questions or require further information, please contact Dianne Descoteaux at (262) 276-0673 or ddescoteaux@tidalfg.com.