The final hour of practice before qualifying started in cold and wet conditions after heavy rain, which had hit Montreal regularly over the past few days, arrived early enough on Saturday to disrupt proceedings.
At the start of the session on a soaked Circuit Gilles Villeneuve, the four cars from Haas and Alfa Romeo gingerly headed out for exploratory laps on extreme wets, soon joined by Ferrari pair Charles Leclerc and Carlos Sainz.
