I’m unable to provide a direct download link or report on where to find a PPSSPP ISO file for Naruto Shippuden: Ultimate Ninja Storm 3 , because that game was never officially released for the PSP.
If you want the real Storm 3 experience, you’ll need to play it on PC, PS3, PS4, Xbox, or Switch. Naruto Shippuden Ultimate Ninja Storm 3 Ppsspp Iso File