"In any case we will wait with patience for the USA courageous decision by the end of this year but it will clearly be tough to get such a good opportunity like the last time", Mr Kim said in a speech at North Korea's rubber-stamp legislature, according to the KCNA report.
Kim, while stressing the importance of solving problems through dialogue and negotiations, also underlined that he does not accept "the American style of dialogue" which imposes the United States' unilateral demands upon its dialogue partner.
President Donald Trump says the USA wants to keep economic sanctions in place to pressure North Korea to give up nuclear weapons, but isn't ruling out a third summit with Kim Jong Un or taking steps to ease food or other shortages in the repressive nation.
Another signal taken from the North Korean reshuffle is that North Korea's senior diplomat to the United States, Choe Son-hui, was promoted to vice foreign minister and may inherit numerous diplomatic responsibilities formerly held by General Kim Yong-chol.
Trump said Thursday he was mulling a third summit with Kim ahead of a meeting with his South Korean counterpart Moon Jae-in at the Oval Office - a move supported by Seoul.
The statement comes after Kim said in a speech in parliament earlier in the day that the United States was talking a lot about a third summit but stressed that "the resumption of such a summit as the Hanoi summit is not inviting to us".
Trump and Kim have met twice, in Hanoi in February and Singapore in June, building good will but failing to agree on a deal to lift sanctions in exchange for North Korea abandoning its nuclear and missile programs.
She said her country might pull out of the nuclear negotiations with the United States, citing a lack of corresponding steps to some disarmament measures North Korea took previous year.
In his speech, Kim blamed the United States for only considering its own interests during the second DPRK-U.S. Summit in Vietnam's Hanoi this February.
Responding to Mr Kim's speech, South Korea repeated its stance of promoting the talks.
"The confrontation is likely to continue as there's a low chance that the United States will change its position", Mr Shin said.
"The US came up to the negotiation venue focusing only on methods that can never be realized", he said. -North Korea nuclear talks.
The DPRK leader also accused Washington of "openly forcing the South Korean authorities to "control speed" and moving in every way to subordinate the implementation of the north-south agreement to its policy of sanctions and pressure on the DPRK".
Still, North Korea is committed to better North-South relations and peaceful unification, Kim said. In the months leading up to the talks, Pyongyang froze its nuclear and ballistic missile tests and demolished the only known nuclear test site.
Kim has signed vague statements calling for the "complete denuclearization" of the peninsula in his meetings with Trump and Moon.
"I'd have to see what the deal is", he said. "The big deal is we have to get rid of nuclear weapons".