The favorites heading into the 2020 Four Continents Championships in Seoul, Sui/Han placed third in the short program after inadvertently performing only a throw double flip. Sui attributed this to her costume. Winning the free skate despite errors on their side-by-side triple Salchows, they won their sixth Four Continents title. Speaking afterward, Sui said that training had been difficult recently due to concerns about whether they would be able to travel abroad because of the coronavirus pandemic. Han said they were "quite satisfied" with their performance. They were assigned to compete at the World Championships in Montreal, but these were cancelled as a result of the coronavirus pandemic.