Marquez was trailing the VR46 duo of Marini and eventual winner Marco Bezzecchi on lap six of Sunday’s 27-lap grand prix at Le Mans.
As Bezzecchi and Marini battled for position, the latter touched the kerb on the inside of Turn 4 and lost the front-end of his Ducati.
Though he was able to keep his bike upright, he lost all momentum and Marquez behind was caught unsighted.
“Scary, but fortunately I’m ok,” Marquez said about the collision.
“I was riding quite smooth and quite good. We did some changes from [Saturday] and I was feeling really good in the warm-up on the pace.
“So, I was just trying to wait a little bit because it was the sixth lap of the race. At that point Luca was struggling a little bit and Marco was attacking him, so I said ‘Ok, if Marco attacks him I will also try to overtake and go’.
“But he did a small mistake on Turn 4 going over the kerb, he lost the front and Marco was able to not touch him.
“I was behind Marco and I didn’t see anything, and when Marco [moved] Luca was there in the middle and I was not able to avoid that crash.”
Source: Autosport