"However, the USA responded to our expectation by inciting worldwide sanctions and pressure against the DPRK".
A statement from the North Korean government, broadcast via the Korea Central News Agency, accused U.S. figures of spouting "falsehoods" about the North Korean nuclear issue.
The United States is "not willing to wait for too long" for North Korea to take steps toward denuclearization, U.S. Ambassador to the United Nations Nikki Haley said on Wednesday.
The United States was "attempting to invent a pretext for increased sanctions against the DPRK".
The foreign ministry said that despite their efforts to work with the USA - by stopping their missile launches and nuclear tests - America continues to insist on "denuclearization first", and continues to encourage global sanctions against the North.
It continued: "Now, the issue in question is that going against the intention of President Trump to advance the DPRK - US relations, some high level officials within the US administration are making baseless allegations against us and making desperate attempts at intensifying the global sanctions and pressure".
A foreign ministry spokesman said in a statement on state-run KCNA that North Korea was still willing to implement a broad agreement made at the landmark June 12 summit in Singapore between U.S. President Donald Trump and North Korean leader Kim Jong Un.
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Ri told Rouhani that Washington's pullout from the 2015 pact and restoration of sanctions was an "action against worldwide rules and regulations", IRNA said.
"The Americans utter lovely words when negotiating and promise a very bright future but they deliver on none of their commitments when it comes to action", Larijani said.
The inter-Korean meeting on Monday will be held at Tongilgak, a North Korean-controlled building in the border village of Panmunjom.
However, the State Department's latest comments on communication between the U.S. and North Korea come amid rising concerns the denuclearization process has slowed to a snail's pace since the North Korea-U.S. summit in June.
The Korean Peninsula is still technically in a state of war because the 1950-53 fighting ended with a ceasefire, not a peace treaty. South Korea's unification minister will lead the delegation from Seoul but North Korea, which proposed the Monday meeting first, did not confirm the makeup of its delegation.
It accused U.S. negotiators of going against the intentions of President Donald Trump and the spirit of the summit in Singapore.