Jean-Eric Vergne believes his qualifying efforts in Canada were undone by his crash and the lost track-time in final practice.
Vergne's running on Saturday morning came to an abrupt end when he lost his car on the grass at Turn 1 and put it into the barriers nose first at Turn 2.
Although there wasn't any significant damage to the car, the accident did put the Toro Rosso driver out of action for the session.
Vergne therefore went into Saturday's qualifying lacking track-time and could only manage a disappointing 20th place.
"My little mistake in FP3 cost me a lot," he said.
"I didn't get any running this morning and then this afternoon, I never really got a clean lap, encountering a lot of traffic which is therefore very disappointing.
"On top of that, my car was quite different today to yesterday, so it was not the easiest thing to adapt to it in just a couple of laps in Q1.
"Even if the traffic would not have made a huge difference to my position on the grid, some cleaner laps would have allowed me to improve my performance and get a better feel for the car with this different set-up.
"As for the morning problem, I got a little bit on the grass which was wet from all last night's rain and the car just got away from me, but the guys worked well to get everything back together for qualifying.
"We always have a good car for the race, so let's wait and see how much ground we can make up tomorrow."