Sam2- But if Hashem doesn’t want that person to die before his time, wouldn’t he save him even he were shot or stabbed? It’s the choice of the one who attacks to do so but he doesn’t get to decide if the person dies.
As far a suicide, I don’t know how that goes. I heard a person cant’ get Olam Habah if he commits suicide but beyond that, I am not familiar with that topic.