Running a full PS3 title like God of War 3 on Android is extremely demanding:
You cannot download a single ISO file and play God of War 3 natively on an Android phone in 2025. Any website promising a "top highly compressed GOW3 ISO for Android" is likely serving you adware or a virus.
Enable Asynchronous Shader Recompiler and turn on Turbo Mode to boost FPS. Alternative: Play via Cloud Gaming