In Jain tradition, Nilanjanā’s death is generally not described as suicide.

Suicide means a person intentionally ends their own life out of despair, attachment, or aversion. In Jain dharma, that is considered himsa and is not approved.

If you are referring to the well-known Jain story of Nilanjanā, her death is usually understood as part of the narrative of impermanence and worldly illusion, not as a deliberate act of self-killing.

So, no — it is not ordinarily treated as suicide in Jain understanding.