Should I perform Chaturdashi Shradh if my ancestor died by suicide?

Yes. The Dharmashastra tradition explicitly includes those who died by suicide under the Chaturdashi Shradh category, approached with compassion rather than judgment. The ritual offering on Ghata Chaturdashi is considered especially helpful for souls who may be in a state of confusion or pain following such a death. The Mrityunjaya Mantra recitation during this Shradh is particularly recommended for such souls.