Is it a sign the administration's approach to North Korea is working, even as Washington and Pyongyang continue to exchange volleys in a war of words?
On Saturday, Kim's government responded by accusing Trump of trying to demonize North Korea, keep it apart from the global community and undermine its government. Between March and May, the regime was conducting tests approximately every one to two weeks.
North Korea has conducted dozens of ballistic missile tests in defiance of United Nations sanctions.
"I say to the North: Do not underestimate us, and do not try us", he said.
DONALD Trump has lashed out at Kim Jong-un saying he would never call him "short and fat" before saying he was trying "so hard to be his friend".
"Reckless remarks by an old lunatic like Trump will never scare us or stop our advance", said the ministry.
"North Korea is not the paradise your grandfather envisioned".
Speaking to reporters on Air Force One while making his way to Hanoi on Saturday, Mr Trump said he believed the Russian leader was being honest when he denied meddling.
North Korean officials described Trump's trip as "nothing but a business trip by a warmonger to enrich the monopolies of the U.S. defense industry".
The harsh words between the leaders have escalated in recent months after North Korea threatened to launch missiles toward the U.S. territory of Guam.
Asked if he could see himself being friends with Kim, Trump said: "That might be a odd thing to happen but it's a possibility".
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Several weeks later, North Korea fired three short-range ballistic missiles, not toward Guam, but rather into the Sea of Japan.
In the fall, missile testing tends to drop off significantly. In April, they tested a KN-17 missile as Vice President Mike Pence was en route to South Korea.
The spectre of Pyongyang's nuclear weapons programme has loomed large over the President's trip, with one of the aims of tour to persuade China to put more pressure on the North.
Trump has traded insults and threats with Kim in the past amid escalating tensions over Pyongyang's nuclear and missile programs.
Trump, being the man who he is, took the bait and threw some insults back at North Korean leader Kim Jong-un.
Trump is in Vietnam as part of a almost two-week tour of Asia, and North Korea's nuclear weapons program has been a major talking point with his Japanese, South Korean and Chinese counterparts.
Asked about the possibility of becoming friends with the North Korean leader during a Sunday joint news conference in Vietnam, Trump did not rule it out.
He said he doesn't know if that friendship will develop, but added it would be "very, very nice if it did". "I don't think we need to reassess our strategy now".
We'll see what happens now.
But the administration shouldn't be too quick to praise North Korea's restraint.
Jouas also stressed that unlike previous conflicts, the U.S. would not be able build up its forces prior to engagement with the North Koreans, stating that it "will take days to months to arrive in theater [of war]".