Parajika link with commentary related to suicide see link for details.
Parajika rules for Sangha against killing
3. Should any bhikkhu intentionally deprive a human being of life, or search for an assassin for him, or praise the advantages of death, or incite him to die (saying): "My good man, what use is this evil, miserable life to you? Death would be better for you than life," or with such an idea in mind, such a purpose in mind, should in various ways praise the advantages of death or incite him to die, he also is defeated and no longer in affiliation.
The Vibhaṅga notes that a statement describing the advantages of dying would fulfill the factor of effort regardless of whether delivered by gesture, by voice, by writing, or by means of a messenger. The same holds true for any statements under the next type of act. d) Inciting a person to die, the fourth type of act, covers: reccomending suicide whether asked or not, telling the best ways to do it. Telling a person to go to dangerous places. Arranging a terrible/heart tugging sight, sound to death.