Sebastian Vettel went out in Q1 at his home grand prix in Germany, meaning he will start Sunday's race from last place on the grid.
Vettel reported power issues and returned to the pits before he had set a lap time at Hockenheim on Saturday.
Mechanics examined his Ferrari but, with less than three minutes of the first qualifying session remaining, the German got out of the car looking deeply frustrated.
Ferrari confirmed via Twitter that Vettel, who was fastest in Friday's first practice session, had suffered a "turbo-related problem".
It is the first time since the Malaysian Grand Prix of 2017, when he suffered a power failure, that Vettel has failed to progress beyond Q1.
Team-mate Charles Leclerc was fastest in the first session ahead of Red Bull's Max Verstappen and championship leader Lewis Hamilton.