Pedro de la Rosa will be driving alongside Kimi Raikkonen at the French Grand Prix.
Montoya is planning to spend the next few months in Miami with his family and wife Connie who is expecting their second child in September.
Montoya will also be making initial preparations for his debut in NASCAR in 2007.
Ron Dennis said:
Juan Pablo Montoya said:Juan Pablo is an exciting driver and immensely likeable character who will undoubtedly make a successful transition to the NASCAR scene. We have agreed that with so many things happening in Juan Pablo's life right now, he should take some time out of the car and prepare professionally and personally for the future.
Pedro de la Rosa said:I know that it will be a tough transition but I'm really excited about the opportunity to move into the NASCAR championship. I have enjoyed most of my time in Formula 1 and I'm grateful for this opportunity to settle my personal life and concentrate on my future career.
I'm of course extremely thrilled to have this opportunity to race the MP4-21 ? a car in which I'm really comfortable. I know the MP4-21 better than anyone else and I'm confident that I can achieve important World Championship points for the team.