He's a wanted man in Russia, and if he stays in Belarus, its only a matter of time before he drinks poison or falls out a window. He might go to Africa, or Syria, but those places are pretty turbulent. Even if he's welcomed by the local dictator, the dictator is not too secure himself and his enemies will be gunning for him. And lets not forget, he has the Western World looking for him, eager to pin war crimes charges on him.

There's always the chance he'll go to some outlaw state, like North Korea, but most of those owe Russia favors. It would not be wise to stay there long. My guess is he'll eventually end up in Saudi Arabia. That's where Idi Amin finished out his days, and where I suspect Donald Trump will eventually retire.

BTW, that's why I think the Donald collected all those classified documents in the first place: to buy himself a hideout if he needed one in a hurry.