The Catalan MotoGP was red-flagged on Sunday after a horrific crash involving multiple riders, including Alex Marquez, on the 12th lap.
Marquez, who was flipped off his bike after it hit a wall, was removed from the track in an ambulance and taken to hospital.
His bike was destroyed while other riders, including Raul Fernandez and Fabio Di Giannantonio were also involved.
The race's medical services said all riders were conscious after the crash, which appeared to have been started by Pedro Acosta's bike cutting out.
The grand prix will be restarted for 13 laps with grid positions based on standings as of lap 11.