'I know we did everything we could': Robin Williams' widow reveals the actor had never spoken about committing suicide while he was battling depression and Parkinson's

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Robin Williams' widow will give her first interview since her husband's suicide last August on Tuesday.

In a preview from her sit down with ABC's Amy Robach, Schneider revealed that despite the fact that he was battling depression and Parkinson's, Williams never once spoke about taking his own life.

'No. Not even - no. No,' said Schneider.

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Robin Williams widow Susan Schneider is opening up about his battle with depression and Parkinson's in his final days

Schneider said in an interview that will air Tuesday on ABC that Williams (above in November 2009) never once spoke about taking his own life

Schneider went on to say; 'I mean, he was sick and tired of what was going on, absolutely … and when he got the Parkinson's diagnosis, you know, I mean, in one sense, it was like this is it. 

'This is what we've been - we've been chasing something, now we found it. And we felt the sense of release and relief. But also, like, "Oh my god, what does this mean?" Okay?'

As for what more people could have done for Williams, Schneider said; 'I know we did everything we could. 

'People have in passing will come …They would say to me, "God, I wish I had done something more for him. If only I had called him." And I'm thinking, "No one could have done anything more for Robin'"'

She then added; 'I just want everyone to know that. Nobody - no one--everyone did the very best they could. 

'This disease is like a sea monster with 50 tentacles of symptoms that show when they want. It's chemical warfare in the brain. And we can't find it until someone dies definitively. There is no cure.'

'I know we did everything we could ... No one could have done anything more for Robin,' said Schneider in the interview

Earlier this month Susan reached a settlement with Robin's children, after a bitter battle over his will and estate.

The Good Will Hunting actor stated in his will he wanted his wife to remain at their multi-million dollar home, with a trust account to pay for the mortgage, insurance and upkeep.

But when she filed court documents seeking more money, claiming what she was assigned wasn't enough, she clashed with Zak, 32, from his first marriage and Zelda, 25, and Cody, 23, from his second, who accused her of being 'greedy.'

'It's the best love I ever dreamed of,' Schneider previously said of her marriage to the 63-year-old actor, who hung himself in August of last year at his Marin County home in Northern California.

Her interview will air Tuesday on Good Morning America, ABC World News Tonight and Nightline.