From personal experience, I've known quite a few Aspies and Aspie-ish individuals. And I've known more than my fair share of people who committed suicide, yet none of them I suspect were Aspie, even mildly as far I could tell. Most of the people I've known who have committed suicide were dx'd with bi-polar or PTSD, or likely had one or the other.
I also have PTSD, which was originally dx'd as Major Depressive Disorder, and yeah, in the past, I've thought about suicide. But things are marginally better for me these days, I'm more aware of who and what I am, I'm getting older, and so I'm learning to deal with it.