The North then walked away from the Stockholm talks on Saturday saying it was disappointed at the lack of "new and creative" solutions offered by Washington, although the U.S. said it was willing to meet again in two weeks.
North Korea's Ministry of Foreign Affairs (MFA) on Thursday warned that the country may reconsider recent measures taken to build trust with the United States, criticizing several European Union countries for their joint condemnation this week of its most recent missile test.
A ministry statement took issue with condemnation Tuesday by the European members of the U.N. Security Council of North Korea's recent ballistic missile and other weapons tests, including its first underwater-launched missile launch in three years on October 2.
North Korea's latest launch was October 2, involving a medium-range ballistic missile Pyongyang says was meant to be launched from a submarine.
The statement did not elaborate, but North Korean officials have previously referred to the freezing of nuclear and intercontinental ballistic missile tests, and the return of remains of USA soldiers killed in the 1950-1953 Korean War, as good-faith gestures to the United States that have not been reciprocated.
Iran is suspected of continuing to cooperate with North Korea on missile development, a recent USA congressional report said after the communist nation carried out a surprise test of a submarine-launched ballistic missile. "This is a serious provocation against the DPRK", a foreign ministry spokesperson said.
"It looks like North Korea is using the U.S.as a pretext for escalating military action, if talks don't work out", said Rachel Minyoung Lee, a Seoul-based analyst at NK News, a publication that focuses on North Korea affairs.
"Our patience is running out, and it is not guaranteed that what we have been restraining from will last indefinitely", the statement said.
North Korea, as part of its efforts to sustain that dialogue, which has included three meetings between its leader, Kim Jong Un, and US President Donald Trump, has stopped testing nuclear weapons and intercontinental ballistic missiles.
"The fact ... is prompting us to reconsider the crucial pre-emptive steps we have taken to build trust with the United States".
Thursday's statement comes amid renewed uncertainty over the future of U.S.
Asked about the latest statement, a U.S. State Department spokesman repeated a call for the North Koreans "to refrain from provocations, abide by their obligations under U.N. Security Council Resolutions, and remain engaged in substantive and sustained negotiations". -North Korea diplomacy, following Saturday's failed working-level talks in Stockholm, Sweden.
North Korea has said such a follow-up meeting is not likely.