Currently exist "no arrangements" for US President President Trump to confer with Russian President Putin "in the near term", a administration representative has announced.
Recently the US president said he and the Russian president would hold talks in Hungary's capital within two weeks to discuss the ongoing hostilities.
A preparatory meeting between America's top diplomat Marco Rubio and his Russian counterpart Sergei Lavrov was due to be held recently - but the administration clarified the two had had a "positive" discussion and that a face-to-face session was no longer "required".
The administration did not share additional specifics on the reason the negotiations had been put on hold.
Trump had raised the possibility of a Budapest summit during a call with the Russian leader, a just prior to meeting Ukraine's Volodymyr Zelensky in the Oval Office.
Various sources claimed his talks with Zelensky had been a "heated exchange", with those familiar indicating Trump had pushed him to cede large areas of Ukraine's east as part of a agreement with Russia.
Nevertheless, on Monday Trump endorsed a truce plan supported by Kyiv and EU officials to freeze the war on the current front line.
"Freeze the lines the way it is," he remarked.
Moscow has consistently objected against pausing the present battle positions.
The Russian government was exclusively seeking "permanent resolution", Lavrov commented on this week, suggesting that halting hostilities would simply constitute a brief pause.
The "root causes" of the war needed to be addressed, Lavrov said, using Moscow's terminology for a series of extensive requirements that involve the acceptance of full Russian sovereignty over the Donbas as well as the disarmament of Ukraine – a unacceptable proposition for Ukraine and its European partners.
Zelensky commented discussions about the current lines were the "beginning of diplomacy" but that Moscow was "employing all tactics" to evade negotiations.
He also said the sole subject that could make Moscow "take notice" was that of the provision of long-range weapons to Ukraine.
Putin's spontaneous discussion with Trump recently came ahead of speculation that the United States was considering delivering extended-range cruise missiles to Ukrainian forces that could theoretically target inside Russia.
The Ukrainian leader asserted it was the weapons consideration that had pressured the Kremlin to enter into dialogue. The conversation concerning the weapons systems had emerged as a "significant input" in negotiations", he added.
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