It is Japan's turn next to host the meeting, which involves its Prime Minister Shinzo Abe, Chinese Premier Li Keqiang and South Korean President Moon Jae In.
The summit was attended by the leaders and representatives of 18 nations, including Japan, the United States, China, Russia and members of the Association of Southeast Asian Nations.
"If talks begin to resolve the North Korea nuclear issue, I feel it will be realistically hard for North Korea to completely destroy its nuclear capabilities when their nuclear and missile arsenal are at a developed stage", Moon said in a briefing.
South Korean President Moon Jae-in holds a summit with Chinese President Xi Jinping at the Crown Plaza Hotel in Da Nang, Vietnam on November 11.
He is set to return home on Wednesday, ending his three-nation Southeast Asia trip that earlier took him to Indonesia and Vietnam.
"Once we enter the dialogue phase, we may be able to discuss while leaving all possibilities open", he said.
"I wish my talks with you, prime minister, today will be a valuable chance to discuss specific ways to expand our cooperation on issues of mutual interest, and also normalize the countries' practical cooperation in areas such as economy, trade and cultural, personnel exchanges that had been partially reduced over the past year", Moon said.
"And I hope that we could make joint efforts to further strengthen this trend".
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Last year's meeting was cancelled amid political turmoil in South Korea, where then-President Park Geun Hye was impeached over a corruption scandal.
They also agreed to accelerate ongoing negotiations between South Korea and the Eurasian Economic Union for a free trade agreement. "A series of three Olympic events will be held in Asia and the Pyeongchang Olympics will be the first of them", he said. "After confirming that position, President Xi said that it is nevertheless important at the present moment to work on the future-oriented development of the two countries" relations".
Still, Moon's planned visit to China coincides with an improvement in relations after the nations agreed to put aside a dispute over the deployment of a USA missile shield on South Korean soil.
The situation on the Korean peninsula dominated discussions at the Asia-Pacific Economic Cooperation summit in the central Vietnamese city of Da Nang.
Moon insisted his summit with Xi, held on the sidelines of the APEC summit in Danang, marked a fresh start in the countries' bilateral relations.
The countries earlier issued a joint statement vowing to put their ties back on the normal track.
It should be noted that Mr Moon, who took office only in May, has already received an invitation to visit Beijing.
Lian Degui, a professor with the School of Japanese Studies at Shanghai International Studies University, said Trump's visits to China, Japan and South Korea sent a signal that the U.S. needed cooperation among the three countries to tackle the North Korean nuclear issue.