Nick Stahl has left the building!

The Terminator 3: Rise of the Machines star had been in rehab for the last 30 days while dealing with a reported drug addiction, but checked out of the facility last week against the advice of his doctors. That's according to the New York Daily News. Although Nick has been spotted briefly in downtown LA since then, no one has been able to locate him for the last several days.

Nick Stahl at the 'Sleepwalking' Premiere, 2008

Related Article: Missing Actor Nick Stahl Reaches Out to Friends!

Nick's friends and family said they continue to be concerned for his health. "He just didn't want to be there anymore...it's very sad," said one source. He's still struggling and has yet to hit rock bottom. Everyone is extremely worried about him."

The actor made plenty of headlines last month after his wife Rose Stahl reported him missing to LAPD officials. Nick sent out an e-mail to friends several days later (but did not include Rose), apologizing for worrying them and informing them that he would be entering treatment.

Do you think Nick will finish out his recommended stay in treatment?

Photos courtesy of Getty Images