Did God forbid Paradise to the suicide, as Al-Sha'rawi said, even though God said: "Indeed, Allah does not forgive association with Him, but He forgives what is less than that for whom He wills"?

A person who commits suicide is one of those who commit grave sins. Texts have been narrated prohibiting Paradise for them and threatening them with torment. However, they are not polytheists who will abide eternally in Hell, and their fate is under the will of Allah Almighty if they died upon monotheism.