He also played down Choe's remarks on ending the moratorium on weapons testing.
A senior North Korean official announced Friday that her regime is rethinking whether to continue nuclear talks with the United States and maintain a moratorium on missile tests, according to foreign news reports.
South Korea's Unification Ministry revealed on Friday that a weekly meeting with North Korean representatives at the Kaesong joint industrial complex has been canceled by Pyongyang's request for the past three weeks. Talks between Mr Trump and Kim - the second time the two leaders have met - collapsed as a result the latter's demands over global sanctions imposed in response to nuclear weapons programme, which it pursued for years in defiance of UN Security Council resolutions.
She said that while the personal relationship between Kim and Trump was "still good and the chemistry is mysteriously wonderful", Kim had doubts about continuing negotiations, according to the New York Times.
His comments follow a suggestion by North Korean-Vice Foreign Minister Choe Sun-hui that denuclearisation talks might end and testing could resume. "The government will put every effort to resume the North Korean - U.S. talks".
What did Pompeo and Bolton say?
Trump told reporters at the time that the US would be unable to accept North Korea's request for total sanctions relief as a precondition for disarmament. "We'll look at ramping those sanctions up in fact", Bolton said.
President Moon: Call Chairman Kim.
North Korea intends to break off denuclearisation talks with the USA, a senior North Korean diplomat said on Friday in comments carried by Russian state media. US officials explained that decommissioning Yongbyon would not do enough to irreversibly end North Korea's nuclear missile program, while the concessions North Korea demanded would effectively unravel the sanctions regime.
Miller explains those are the sanctions that came after 2016 and have "effectively cut off North Korea, their supplies for coal, copper, crude oil, those are the ones that basically North Korea wanted relief [from]".
Commercial satellite images, released by USA -based think tanks, suggested the North may be rebuilding its Dongchang-ri long-range rocket test site close to the border with China. "Known as the Sohae Satellite Launching Station, the site has been used for several attempted space launches over the years, most recently in 2016". Recent satellite imagery shows that construction to rebuild the site began between February 20 and March 2. "In imagery from March 13, the transfer structure remains in the same position and the environmental cover still conceals the gantry tower".
A senior official said Trump "is not prepared to reward North Korea in exchange for talks". "That's the requirement laid out by the United Nations Security Council", he said.
The tone of the North Korean Foreign Ministry, highlighting the lack of progress in the implementation of the denuclearization issue, is in stark contrast to the far more optimistic rhetoric from the United States special representative for North Korea, Stephen Biegun.
"As long as there's no testing", said Mr Trump, "I'm in no rush".
"I don't think that really falls in the line of the way that the North Koreans approach things".
Miller asserts that since activity was taking place before the Hanoi summit, it was not being conducted as a reactionary tool from no deal being struck in Hanoi.