In the end, the summit was organized on 12 June and Choe was present. She was replaced as the head of working-level negotiations in early 2019. At the 2019 North Korea–United States Hanoi Summit that ended prematurely and without an agreement, Choe was the last person to have talked to the American team of negotiators. She made a last-minute suggestion that all facilities of the Yongbyon Nuclear Scientific Research Center could be demolished. When she was then asked to clarify what the offer meant, she was unable to give any further details, resulting in the American team walking out.