Japan's Takuma Sato will not stay on at BAR as a reserve driver after losing his Formula One race seat, according to his manager Andrew Gilbert-Scott.
Sato finished third in the 2004 US Grand Prix
"I can't see any benefit. There are two race drivers on long-term contracts so there's no future," Gilbert-Scott said.
"We want to find something to move forward," he added.
Briton Jenson Button confirmed on Wednesday he will continue to drive for BAR next year while Brazilian Rubens Barrichello is to join from Ferrari.
BAR, which is 45% owned by Honda, have been heavily criticised for dropping Japan's only F1 driver.
And Gilbert-Scott said he was hopeful of securing a competitive drive for Sato for 2006.
"We are working on trying to get him in a race seat for next year, that's my priority. I'm hoping, I'm optimistic," he said.
"I'm not looking at America or anything else. I'm very optimistic that we'll get something in F1.
"We've had a lot of support and there's been a huge amount of disappointment (in Japan) at what has happened."