Capcom brought Monster Hunter Portable 3rd to PlayStation 3 with a HD remastered version. The game was working fine until system update version 4.30, which somehow affected Monster Hunter Portable 3rd HD Version.
Sony confirmed that the latest firmware makes Monster Hunter Portable 3rd HD Version freeze at several different points in the game. Sony Computer Entertainment Japan is already working on new firmware to remedy the issue and hope to release the update soon.