Joseph Yun's comments came after US Secretary of State Rex Tillerson created a stir by appearing to open a door to direct talks with the North without preconditions - a major policy shift that the White House swiftly rowed back on.
Japan has insisted that now is the time to keep up maximum pressure on Pyongyang, not start talks on the North's missile and nuclear programmes.
And so, we've seen this Kim, Kim Jong-un, distancing North Korea from China, from the alliance with China.
Cho Hyun warned a ministerial meeting of the U.N. Security Council on Friday that if North Korea can put a nuclear warhead on an intercontinental ballistic missile "it will fundamentally alter the security landscape in the region and beyond".
North Korea's U.N. ambassador is calling the U.N. Security Council's ministerial meeting on its escalating nuclear and missile programs "a desperate measure plotted by the USA being terrified" by Pyongyang's nuclear capabilities.
He pointed to the November 29 launch of an intercontinental ballistic missile, which experts say could reach the US mainland.
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"We have been clear that all options remain on the table in the defense of our nation", Tillerson told the council, "but we do not seek nor do we want war with North Korea". I think, over time, there will be a perception, especially among the South Korean and Japanese people that the bond between the United States and these countries, that is the influence of the U.S.in this part of Asia, will weaken and that, over time, we will decouple from these allies.
Instead of responding, the ambassador said the council has adopted 11 sanctions resolutions against North Korea.
"All of these steps force us to wonder about the sincerity of statements that suggest that there is a preference for a peaceful approach to resolving the crisis" by the United States, Nebenzia said. But all these bans haven't stopped Kim's nuclear and missile tests, or led to negotiations.
Seeking to increase the pressure further, Mr Tillerson called on China and Russian Federation, the powers with closest ties to North Korea, to go beyond UN-mandated economic sanctions.
But he pushed back against USA insistence that China holds the key to resolving the crisis.