During the War of the Ring started, Nestadion attended the Council of Elrond and was one of those that decided that the Ring of Power must be destroyed in the fires of Mount Doom. He left Rivendell with some of his people, including Arwen, to the Grey Havens.
Nestadion eventually travelled with 2,700 elven warriors to Dunharrow to aid the armies of the Free Alliance in facing the enemy. He later participated in the Battle of Pelennor Fields and survived the chaotic battle. After Sauron's defeat, Nestadion attended the coronation as he smiled at Aragorn and stepped aside, so Aragorn could marry Arwen. Nestadion cheered, for he was happy for them, and proud of Aragorn.