There are "no arrangements" for US President President Trump to meet Russian President Vladimir Putin "in the immediate future", a administration representative has announced.
Last Thursday Trump said he and the Russian president would hold talks in Hungary's capital within two weeks to discuss the war in Ukraine.
A initial discussion between US Secretary of State Marco Rubio and his opposite number Sergei Lavrov was scheduled to occur this week - but the administration said the two had had a "constructive" conversation and that a meeting was not "necessary".
The administration withheld any more details on the reason the negotiations had been put on hold.
Trump had discussed a Budapest summit over the phone with the Russian leader, a day before meeting Ukrainian President President Zelensky in the White House.
Certain accounts suggested his talks with Zelensky had been a "contentious discussion", with sources suggesting the president had pressured him to cede large areas of Ukraine's east as part of a settlement with Russia.
However, on Monday the American president embraced a ceasefire proposal backed by Ukraine and EU officials to halt the hostilities on the current front line.
"Freeze the lines where it stands," he remarked.
Moscow has repeatedly pushed back against pausing the existing front lines.
The Russian government was only interested in "long-term, sustainable peace", Russia's foreign minister said on this week, indicating that freezing the front line would simply constitute a brief pause.
The "root causes" of the hostilities required resolution, the Russian diplomat emphasized, using Moscow's terminology for a set of comprehensive conditions that involve the acceptance of complete Moscow control over the Donbas as well as the disarmament of Ukraine – a impossible condition for Ukraine and its EU supporters.
The Ukrainian president commented discussions about the current lines were the "commencement of dialogue" but that Moscow was "employing all tactics" to avoid diplomacy.
He also said the sole subject that could cause Russia to "pay attention" was that of the provision of distance-capable munitions to Ukraine.
Putin's unscheduled call with the US leader recently occurred before reports that the US was planning to provide distance-capable weapons to Ukrainian forces that could possibly hit deep into Russia.
The Ukrainian leader stated it was the weapons consideration that had pressured the Kremlin to enter into dialogue. The discussion regarding the missiles had proven to be a "strong investment" in diplomacy", he remarked.
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