Susan Schneider, Robin Williams

Robin Williams' wife, Susan Schneider, released a statement Thursday revealing that the actor was in the early stages of Parkinson's Disease when he committed suicide earlier this week. She also laid to rest rumors that Williams, who has struggled with addictions to drugs and alcohol, had relapsed ahead of his death.

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"Robin's sobriety was intact and he was brave as he struggled with his own battles of depression, anxiety as well as early stages of Parkinson's Disease, which he was not yet ready to share publicly," Schneider said in her statement.

After Williams, 63, hanged himself at his home Monday, his publicist said in a statement that he had been struggling with "severe depression" in recent months. Earlier this year, he had checked back into rehab in order to maintain his sober lifestyle.

"Since his passing, all of us who loved Robin have found some solace in the tremendous outpouring of affection and admiration for him from the millions of people whose lives he touched," Schneider said in her statement. "His greatest legacy, besides his three children, is the joy and happiness he offered to others, particularly to those fighting personal battles. ... It is our hope in the wake of Robin's tragic passing, that others will find the strength to seek the care and support they need to treat whatever battles they are facing so they may feel less afraid."