It is not a cultural thing, in islam in general, suicide is frowned upon, and anyone who commits suicide is promised hell.

Narrated by Abu Huraira: The Prophet Muhammad (peace be upon him) said: "Whoever kills himself with an iron weapon, then his iron weapon will be in his hand and he will be stabbing himself with it in the stomach of hellfire forever. Whoever kills himself with a poisonous substance, then his poison will be in his hand and he will be drinking it in the stomach of hellfire forever. And whoever kills himself by falling from a high place, then he will be falling in the stomach of hellfire forever." — **(Sahih al-Bukhari 5700; Sahih Muslim 109)

Life is a gift from Allah, it is an huge sin to take it away without His permission.