What do you do if your game won't save on the Sims 3 3ds?

If your game won't save on The Sims 3 for the 3DS, first try restarting the game and your device to see if that resolves the issue. Ensure that your game cartridge is clean and properly inserted. If the problem persists, check for any software updates for the game or the system. Lastly, consider backing up your save data if possible, as it may be corrupted, and you might need to start a new game.