Nelvana III was a planet located in the galaxy's Alpha or Beta Quadrants, the third planet in orbit of the Nelvana star system, within the space of the Romulan Neutral Zone. In the year 2366, Romulan Admiral Jarok sought asylum on the Federation starship USS Enterprise-D with information that the Romulan Star Empire was building an invasion force on Nelvana. Arriving there, the Enterprise crew found no evidence of military activity and the defector realized it was just a test of his loyalty. (TNG episode: "The Defector")