for full Canadian Grand Prix FP3 times.
Sebastian Vettel has shot to the top of the timesheet by becoming the first driver into the 1m 13s bracket as both Ferrari and Red Bull make a charge on Mercedes but the final practice was curtailed early after Kevin Magnussen crashed heavily.
After splitting the Mercedes drivers in FP2 yesterday, Vettel clearly dialling in his Ferrari with the aid of an updated turbocharger, broke past the best time set by Max Verstappen earlier in the session with a 1m 13.919s.
Verstappen, enjoying the upgraded Renault power unit for the first time this year, has also found smart gains to beat Lewis Hamilton's top time from Friday with a 1m 14.158s to jump into second.
Hamilton failed to replicate his same pace from Friday in FP3 and was denied any chance to improve in the final 30 minutes of the session with rain in the air slowing the cars down.
The session was halted entirely with 13 minutes remaining after Magnussen shunted into the wall at the exit of turn seven, reportedly damaging the concrete barrier.
The Danish driver, on a slower out lap, was clicking up the gears from second to third but immediately lost grip from the rear and with the wall so close to the edge of the track he slammed into the barrier.
The clean-up job signalled an early end to the session with Magnussen being taken care of by the medical team and the Montreal circuit. With FP3 over prematurely, Rosberg held third on the timesheet with a 1m 14.316 – four-tenths faster than his top time from Friday – with Kimi Raikkonen fourth as Hamilton completed the top five.
Daniel Ricciardo completed the top three teams out front in sixth with a two-tenth gap back to Carlos Sainz as Fernando Alonso rose to eighth late on closely followed by Sergio Perez and Felipe Massa to set up an intriguing midfield battle.
Nico Hulkenberg ended the session 11th ahead of the second Williams of Valtteri Bottas and the other McLaren of Jenson Button.
Daniil Kvyat is still struggling to adapt to the Toro Rosso, having been forced to use the escape road at turn three, to end the session 14th – half a second off team-mate Sainz.
Haas continued to lead the rest with Esteban Guiterrez in P15 in front of Renault's Jolyon Palmer, with Romain Grosjean, Marcus Ericcson and the stricken Magnussen following. Felipe Nasr, Pascal Wehrlein and Rio Haryanto completed the 22 runners.