If you want to play God of War 3 on your Android device, here are your only real options:
First, a critical fact:
God of War 3 was originally released for PlayStation 3 (and later PS4 via remaster). It has never been officially released for Android by Sony or Santa Monica Studio.
Any website or video claiming to offer “God of War 3 highly compressed for Android APK + data” is not legitimate. These files are usually: god of war 3 highly compressed for android
A: No. The PSP had two exclusive prequels: Chains of Olympus and Ghost of Sparta. Neither is God of War 3. You can play those highly compressed (around 700MB) perfectly on PPSSPP emulator. Those are worth your time.
These do run well on Android via emulators (like AetherSX2 or PPSSPP): If you want to play God of War
These are not GOW3, but offer excellent Kratos action on mobile.
Since God of War 3 isn’t available, here are the closest experiences you can legally play on Android right now: A: No
A: Those videos use clickbait thumbnails (usually a screenshot from the PS4 remaster) and fake APK links. Some videos show a "gameplay" that is actually God of War: Betrayal (a Java side-scroller from 2007) or a modded Minecraft skin.