Hamilton had topped FP3 in Montréal by a healthy margin earlier on Saturday.
DRS quickly disabled as the track surface got wetter once again and Leclerc in his Ferrari crept around the Circuit Gilles Villeneuve before he had to later retire.
It is thought that at least one incident of a similar nature has occurred at the conclusion of previous editions of the Canadian GP.
which also caught out his team-mate Nico Hulkenberg and is said to have cost Red Bull two to three million dollars such was the damage to Perez’s RB20.
the team boss adamant every new part that’s been put on the car this season has “earned their place”.