Is there any scene in Naruto where anbu commits suicide? I cant find but Im sure there was a scene where Kabuto chases an Anbu and that Anbu commits suicide or something like that
You're probably thinking of the Body Elimination Technique, which makes it debut in filler episode A Shinobi's Determination


  An Anbu member seemingly manages to locate the general area of Orochimaru's hideout and sends a message to Konoha to notify Tsunade, before eliminating all traces of his body