The Australian centre had been hopeful of suiting up for the Warriors in their opening clash with Phoenix on October 31 but time is running out to prove his fitness.
Having been ruled out of the Warriors' entire pre-season as he rehabs the ankle he fractured in January, Bogut has yet to take part in a team practice since being traded to the franchise from Milwaukee in March.
The Boomers bigman met with his surgeon in Los Angeles over the weekend, but could not get a date for his return to the court - even though he is yet to be officially ruled out of the Suns fixture.
"While the results of (the) examination were positive and Bogut remains on his rehab schedule, the exact date of his return to full basketball activity has not been determined," the Warriors said in a statement.
"Bogut and the team are not setting any deadlines or time tables and the plan remains as it has been from the outset: Bogut will return to action when his ankle is 100 per cent."
The 27-year-old suffered the ankle fracture when he landed awkwardly on an opponents foot during a match against Houston while playing with Milwaukee.
That ruled him out for the rest of the 2011-12 season and ended his chances of playing for the Boomers at the London Games - where Australia were knocked out in the quarter-finals by gold medallists the USA.
Bogut has been plagued by injuries which have stunted his career as one of the game's best big men - most notably a nasty arm injury which ended his 2009-10 season.
Bogut dislocated his right elbow, sprained his right wrist and broke his right hand in a hard fall - injuries which have continued to bother him even last season.
In better news for Australians in the NBA, Boomers point guard Patty Mills made his return to the court in San Antonio's 104-100 pre-season loss to Orlando.
In his first game back from a sprained ankle, suffered earlier this month, Mills played 17 minutes, scoring six points and grabbing a steal.