The North Korean government completely ignored the Trump administration's efforts to nail down details of a planned June 12 nuclear arms summit in Singapore, effectively disappearing in the middle of pre-meeting protocol negotiations.

Secretary of State Mike Pompeo had met personally in April with Kim Jong-un in Pyongyang, sketching out the contours of the face-to-face that President Donald Trump canceled Thursday morning.

In testimony during a Senate Foreign Relations Committee hearing, Pompeo said there was no chance of 'a successful outcome,' in some part because Kim's team was AWOL when it counted.

'Over the past many days we have endeavored to do what Chairman Kim and I had agreed, [which] was to put teams, preparation teams together, to begin to work to prepare for the summit,' he told senators. 'And we had received no response to our inquiries from them.'

U.S. Secretary of State Mike Pompeo told a Senate panel on Thursday that North Korea's government disappeared at a crucial point in pre-summit negotiations

Kim Jong-un (pictured, 2nd left) and Donald Trump were to meet June 12 in Singapore for nuclear disarmament talks

Trump called off the meeting Thursday morning in a letter to Kim

Instead of engaging with the White House, Kim lashed out at Mike Pence following the U.S. vice president's comments hinting that North Korea could face the same fate as Libya if it doesn't disarm.

In a letter to Kim calling off the Singapore summit, Trump cited 'the tremendous anger and open hostility displayed in your most recent statement.'

'You talk about your nuclear capabilities, but ours are so massive and powerful that I pray to God they will never have to be used,' the president wrote.

In the Senate hearing, Pompeo asked for patience while the State Department tries to jump-start negotiations.

'I am going to reserve some space for us to be able to conduct these discussions outside of the public sphere. I think that's important,' he said.

Pompeo insisted that Trump's team stands ready to come back to the negotiating table if North Korea abandons the silent treatment.

The White House wants North Korea to destroy its nuclear weapons program in exchange for relaxing economic sanctions that have walled off Pyingyang from most of the rest of the world

Pompeo is pictured Thursday morning reading Trump's letter to Kim Jong-un before the Senate Foreign Relations Committee hearing

The U.S. 'received no response to our inquiries from them,' Pompeo said of the final days of preparation for the June 12 Singapore summit

'I think the American team is fully prepared. I think we're rocking. I think we're ready,' he said.

'I think we're prepared for this meeting. I think President Trump is prepared for this meeting. We were fully, fully engaged over the past weeks to prepare for this meeting.'

'I hope we quickly are able to get back to that place,' he said. 'But ultimately Chairman Kim will have that decision to make for himself. As the president said, we welcome their call, their outreach, to head back down that path.'

In the absence of progress, Pompeo said, 'in some ways it's "situation normal." The pressure campaign continues.'

Wednesday during a parallel hearing in the House of Representatives, Pompeo signaled that the ball was in Pyongyang's court.

While he was 'hopeful' the summit would take place, he said, 'That decision will ultimately be up to Chairman Kim.'

But he said there would be no concessions offered in order to move forward.

'A bad deal is not an option. The American people are counting on us to get this right. If the right deal is not on the table, we will respectfully walk away,' he said.