The general public
This is Kawaguchi Hidetoshi. This is a humble answer to the question.
As Mr. Urakami already answered, there is no such thing as recommending suicide or suicide in Buddhism.
Certainly, there were cases where disciples committed suicide during Shakyamuni's reign. Please refer to the following page for this.
“Does Buddhism really prohibit suicide?”
http://www.geocities.co.jp/Technopolis/3138/suicide_buddhism.html
On top of that, I have expressed my humble opinion on the following question.
Question “Why you shouldn't commit suicide”
http://blog.livedoor.jp/hasunoha_kawaguchi/archives/1002970251.html
Next, “If you honestly learn the 'sky' of Buddha, I don't think suicide will happen.” ... However, understanding the truth of “emptiness” (absence, intangeness, lack of autonomy) is also important, in other words, understanding “luck.”
The question “Which is more difficult, living or dying?”
http://blog.livedoor.jp/hasunoha_kawaguchi/archives/1002992500.html
As I mentioned in my humble answer above, advancing understanding of “sky and fortune” is a very important key to overcoming hesitation and suffering.
If we deal with this in detail here, a huge amount of explanation is necessary, but if I were to explain it simply without fear of misunderstanding, understanding “emptiness and luck” is also a firm understanding of the theory of cause and effect, and in terms of bad causes and bad effects, it means that it is impossible to do things on your own that are clear to be bad results, so it is very impossible to commit suicide/suicide due to ignorance or distress (suicide/suicide as bad work) due to ignorance or distress .
Anyway, we need not only an understanding of emptiness, but also an understanding of good fortune to proceed without error.
By all means, I would be grateful if you could continue to deepen your understanding of “sky and fortune.”
Kawaguchi Hidetoshi Gassho