Suarez took advantage of a goalkeeping error by Saudi Arabia's Mohammed Al-Owais to put Uruguay ahead midway through the first half.
Germany has claimed just one unconvincing win in seven games since the end of the qualifying campaign.
Forget stylish attacking moves, this is set-piece
Mexico beats defending champion Germany
Salah returned to action for his side's do-or-die clash with Russia but was a pale imitation of the player who dazzled for Liverpool.