I notice you're looking for a "FIFA 21 PS3 ISO verified" file. However, I should let you know:
Modders had taken the last playable engine on the PS3 and manually updated textures, faces, and database files to simulate the 2021 season. For players in regions where upgrading to a PS4 wasn't an option, or for fans who preferred the slower, more tactical gameplay of the PS3 era, this ISO was a
: Updated UI graphics to mimic the look of the official FIFA 21 on newer consoles.