Chris Brown has attention deficit disorder and suffered from depression earlier this year when a judge gave him another 1,000 hours of community labor, according to his latest probation report.

The R&B singer, on probation for a 2009 felony assault on Rihanna, told a probation officer that an anger management program he entered last month "enabled him to gain stability he needed to complete his community labor hours," and that he anticipated being there for 90 days.

But a little over week after making that statement, Brown was kicked out of the program after he threw a rock through his mother's car window, according to the probation report.

DOCUMENT: Read the probation officer's report

According to the report, Brown has ADD and suffered a "setback mentally and emotionally" when he was "not credited for all the hours" he served in community labor and underwent a period of depression.

The incident occurred Nov. 10 during a family counseling session in which his mother said she wanted him to remain in treatment, the records show. Brown allegedly walked outside and tossed a rock through her car window. The window shattered but no one was hurt.

The treatment center immediately expelled him for violent behavior, according to a letter in the probation report.

On Wednesday, Brown was ordered by a judge to undergo 90 days of rehab, complete 24 hours a week of community labor and submit to periodic drug tests in his probation.

L.A. County Superior Court Judge James Brandlin made the order after a similar recommendation from the L.A. County Probation Department.

Brown's attorney, Mark Geragos, and L.A. County Deputy Dist. Atty. Mary Murray agreed to the action. Brown, dressed in black, said, "Yes" when asked if he agreed to the order.

Brown must work three eight-hour shifts of community labor each week even in rehab, the judge said.

The judge also granted a prosecutor's request for a supplemental probation report on Brown's recent arrest in Washington, D.C. The judge said Wednesday's order is not a sentence for a probation violation.

Brandlin agreed to Geragos' request to allow Brown to take medication prescribed by his doctor. 

In the latest probation report, officials noted that Brown tested positive for marijuana in Virginia but produced a card from an acupuncturist authorizing the drug's use. According to a letter from Virginia officials to the L.A. County Probation Department, Virginia law does not permit the use of marijuana under any circumstances.

Brown checked into rehab last month on his own, a day after he appeared in a Washington court on a misdemeanor assault charge, to which he pleaded not guilty.

The Washington charge could have implications in Los Angeles, if a judge determines Brown violated probation in his conviction for the 2009 felony assault on Rihanna, his then-girlfriend. The terms of his five-year probation require he obey all laws.

As part of his sentence, Brown had to complete an anger-management course and extensive community service. But he has been accused by prosecutors of violating the terms by disobeying laws and failing to perform the appropriate community service.

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richard.winton@latimes.com