Robin Williams' wife Susan Schneider revealed that her husband was in the "early stages of Parkinson's disease" but was "not yet ready" to share the news publicly
Published reports also claim that Robin Williams and his third wife, Susan Schneider, were planning to have a child together. Robin Williams, 63, and his wife, Susan Schneider, 50, wanted to have a child before the actor's death in spite of the difficulties pregnancy could be because of their age. 

Reports had been going around that Robin Williams, a recovered alcoholic and drug addict, may have fallen off the wagon, but Williams was sober when he hanged himself.
In a statement Schneider said Robin Williams had Parkinson's disease and was sober when he died.

Susan Schneider says Robin Williams was struggling with the early stages of Parkinson's disease when he hanged himself in their home near San Francisco. The actor and comedian had only told those closest to him.

Michael J. Fox, who was diagnosed with Parkinson's in the early 1990s took to Twitter to say "Stunned to learn Robin had PD. Pretty sure his support for our Fdn predated his diagnosis. A true friend; I wish him peace."

Parkinson's disease is an incurable neurodegenerative brain disorder that progresses slowly and affects movement and mood. Depression is sometimes a symptom of Parkinson's.The National Parkinson's Foundation estimates that 1 million people in America have Parkinson's disease.

Here is Susan Schneider's full statement:

Robin spent so much of his life helping others. Whether he was entertaining millions on stage, film or television, our troops on the frontlines, or comforting a sick child - Robin wanted us to laugh and to feel less afraid.  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. His greatest legacy, besides his three children, is the joy and happiness he offered to others, particularly to those fighting personal battles. 

 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. 

 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.