For the BMW WilliamsF1 team was encouraging as both Mark Webber and Nick Heidfeld were able to show signs that they weer now in the pace of their main rivals Renault, McLaren, and BAR. Mark Webber would finish the session in sixth while Nick Heidfeld was in eighth.

The start of the third practice session for the Canadian Grand Prix would see
Friesacher and Monteiro take to the track for their installation lap. They would be
joined by both Raikkonen and Montoya, as well as the other Minardi and Jordan cars of Albers and Karthikeyan.

The first driver to set a time would be Monteiro with a slow time of 1m:21.341.
Friesacher would beat this time with a 1m:21.201. Also coming out were both of the Renault drivers, Alonso and Fisichella. They were joined by BAR's Takuma Sato and Toyotas Ralf Schumacher. Alonso would easily beat the time of Friesacher with a time of 1m:17.897. Just as quickly Fernando's time would be beaten by team-mate Fisichella with a time of 1m:17.589. Sato was now in third with a time of 1m:18.410.

With fifteen minutes of the session remaining Ralf would move into fifth with a time of 1m:19.737. Karthikeyan was in fourth with a 1m:19.648. Ralf would improve to now be in fourth with a 1m:18.417. Both of the Ferrari's had now completed their installation lap. Raikkonen was now in second with a time of 1m:17.83. These times were considerably slower than those set on Friday.

Barrichello and Michael Schumacher were down in ninth and tenth. Rubens would improve to be in seventh. At the front Kimi would go fastest with a time of 1m:17.500. Finally both of the BMW WilliamsF1 cars would take to the track. Rubens was now in sixth with a time of 1m:18.546. Mark Webber's first lap was a 1m:22.153 which saw him last, some 4.6 seconds off the pace.

Michael Schumacher had moved into third with a lap time of 1m:17.852, but Toyota's Jarno Trulli would take this place with a time of 1m:17.798. Nick Heidfeld was now in seventh with a time of 1m:18.010. Mark had improved his time to now be a 1m:18.862. It was all happening in the closing minutes with Alonso now fastest and Trulli second. But Nick would go faster than Trulli to now be in second with a time of 1m:17.278. Alonso would improve his time with a 1m:16.961. Button was now second while Mark had been able to move up to fifth with a time of 1m:17.441. At the front nick and Alonso would trade places with Nick going fastest with a time of 1m:16.569 only to see Fernando go quicker with a time of 1m:16.062. Mark was now in third with a 1m:16.588.

The Red bull's of Klein and Coulthard were in eleventh and fourteenth. Button would again go second fastest with a time of 1m:16.386, while Alonso had improved his time to drop into the 1m:15 second with a 1m:15.837. Montoya was now in fifth with Fisichella sixth. Mark would go ahead of team-mate Heidfeld going third fastest with a time of 1m:16.463. Alonso would go quicker again with a time of 1m:15.582. But his rival Raikkonen would move into second with a time of 1m:15.826.

Sauber's Felipe Massa was in ninth, with team-mate Villeneuve twelfth. Mark and Nick were now in fifth and sixth. Sato and Montoya were in seventh and eighth. in the final minutes Fisichella was now in second, Raikkonen third, and Sato and Button were in fourth and fifth. Mark was in sixth with Michael Schumacher seventh and Nick eighth. The final two places in the top ten went to Montoya and Massa.