The Trump administration has said that sanctions will not be lifted until North Korea gives up its weapons.
The meeting was postponed at North Korea's request because of the "hectic schedules" of both countries, the Foreign Ministry said.
"The US maintains the position that it would maintain maximum pressure until the North produces visible progress on denuclearisation and so does the worldwide community including the EU", Chung Byoung-gug told the JoongAng Ilbo newspaper.
Foreign Minister Kang Kyung-wha provided no reason, aside from "busy schedules", for why North Korea canceled the meeting set for Thursday in NY that was meant to discuss ridding the North of its nuclear weapons and setting up a second summit between U.S. President Donald Trump and North Korean leader Kim Jong Un. This has fueled doubts about whether Kim will ever deal away a nuclear program he may see as his strongest guarantee of survival.More news: White House accused of editing footage of CNN reporter
"I would love to take the sanctions off, but they have to be responsive too". Washington says the sanctions will remain until North Korea takes concrete steps toward irreversibly and verifiably relinquishing its nuclear weapons.
"While it's notable and disappointing that North Korea's envoy failed to show up for talks with the United States, it's not altogether surprising", Jean Lee, head of the Korea program at the Wilson Center, wrote on Twitter.
Some analysts believe this weakened state could impact Trump's foreign policy and test his North Korean diplomatic gambit. After his June meeting with Kim, Trump raised security jitters in Seoul by abruptly canceling major USA military exercises with South Korea which North Korea had termed invasion rehearsals. "The North simply got what it wanted the last time".
Kang said she is arranging a phone call with her U.S. counterpart, Pompeo.More news: New Falcons DE Bruce Irvin says Patriots offered more money
But the State Department said early on Wednesday that the meeting had been postponed and gave no reason, raising concerns that talks aimed at persuading North Korea to give up its nuclear arms could break down.
"It is an estimate for now. we will continue efforts, including policy coordination with the U.S., to carry out the projects agreed between the two Koreas without a hitch", said the official who declined to be named. "This is the case we're dealing with, purely a scheduling issue, and it's as simple as that", the US State Department's deputy spokesperson Robert Palladino said at a regular briefing.
Trump told a White House news conference the change was "because of trips that are being made", but did not elaborate on these. "And I'll leave it at that".
Kim Jong Un shifted to diplomacy early this year and has held three summits with South Korean President Moon Jae-in.More news: Final Fantasy XV Director Hajime Tabata Leaves Square Enix, DLC Cancelled
Russian Federation and China have argued that North Korea should be rewarded with an easing of sanctions for halting missile tests and opening up a dialogue with the United States on denuclearization of the Korean peninsula.