Do you think it would help your daughter if you talked to her about AS and tell her she has it, and that explains (partly at least) why she is different in some ways from other people? It is too bad she has missed all the years of help she could have had if she had been diagnosed years ago.
I don't have any knowledge of suicide and AS. I hope someone comes along to address that.
It may help her to stress that AS is okay. Everyone is different anyway. She has strengths and challenges like we all do. AS though could explain why some things are difficult for her--too much noise, crowds, change of plans, scratchy clothes.