There were a series of "broken promises" from Pyongyang, the official told reporters, including when the White House sent the deputy chief of staff to Singapore to meet North Korean diplomats ahead of the summit.
North Korea had sharply criticised suggestions by Trump's national security adviser, John Bolton, and Vice President Mike Pence that it could share the fate of Libya if it did not swiftly surrender its nuclear arsenal. "They simply stood us up", one White House official said, according to the Washington Post. "He may be doing that, too".
He added that North Korea "inwardly highly appreciated" Trump for agreeing to the summit, and hoped the "Trump formula" would help lead to a deal between the adversaries.
South Korea, which brokered the talks between Washington and Pyongyang, was caught off guard by Trump's abrupt cancellation of the summit in which he cited hostility in recent North Korean comments.
While the White House has clearly stated that North Korea must take significant steps toward complete denuclearization in a limited time frame before any sanctions can be relaxed or significant rewards given, Pyongyang has called for a "synchronous" process of disarmament in which gradual steps towards denuclearization are met with concurrent US economic and security concessions.
Trump, in his letter to Kim, objected specifically to a statement from a top North Korean Foreign Ministry official.
Pyongyang on Friday said in a statement that it is still willing to "sit with the USA side" for talks "at any time". "We'll see what happens - it could even be the 12th".
On Friday, a visibly shocked Moon had said he regretted the summit's cancellation and urged direct talks between the USA and North Korean leaders, instead of relying on current communication channels which he said were ineffective in dealing with the sensitive issues that needed to be overcome. He said: "They very much want to do it, we'd like to do it".
The erstwhile businessman also suggested the war of words was a way of jockeying for leverage.
"Everybody plays games. You know that", he told reporters when asked about the ongoing talks.
Bruce Klingner, a former Central Intelligence Agency division chief for the Koreas who is now at the conservative Heritage Foundation, said the latest developments aren't so much a PR campaign as a negotiating tactic.
GETTYThe US president called the North Korea summit off
The comments came just a day after Trump cited Pyongyang's "open hostility" in canceling the meeting.
The Friday morning (local time) tweet came a day after he withdrew from the June 12 summit.
"It's like throwing a wedding together kind of overnight", he said.
While the statement may keep the possibility of a summit alive, there were also hints in North Korea's response to Trump that Pyongyang was willing to walk away.
Politico magazine reported that an advance team of 30 White House and State Department officials was preparing to leave for Singapore later this weekend.
Moon and Kim held a historic summit in April where they announced vague aspirations for a nuclear-free peninsula and permanent peace, which Seoul has tried to sell as a meaningful breakthrough to set up the summit with Trump.
The president first discussed re-entering peace talks early Friday when he tweeted, "Very good news to recieve the warm and productive statement from North Korea".
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And it's between North Korea and the US right now.
USA defense and intelligence officials have repeatedly assessed the North to be on the threshold of having the capability to strike anywhere in the continental US with a nuclear-tipped missile - a capacity that Trump and other US officials have said they would not tolerate.
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