The move followed talks between General Secretary of the Communist Party of Việt Nam (CPV) Central Committee Nguyễn Phú Trọng and US President Joe Biden at the headquarters of the CPV Central Committee in Hà Nội.
Biden is in Việt Nam for a two-day State visit at the invitation of the Vietnamese Party leader.
US President Joe Biden arrived at Nội Bài International Airport in Hà Nội on Sunday afternoon, starting a two-day State visit to Việt Nam at the invitation of General Secretary of the Communist Party of Việt Nam Central Committee Nguyễn Phú Trọng.
Kim has stayed at his luxury hotel without issuing any public message in person since the summit.
The country‘s foreign minister, Ri Yong-ho, instead held a sudden late-night press conference and said his regime demanded partial sanctions relief for its dismantlement of the Yongbyon nuclear complex in the negotiations.