There are "no plans" for American leader President Trump to confer with Russia's Putin "in the near term", a White House official has announced.
This past week the US president indicated he and the Russian president would meet in Budapest within two weeks to discuss the ongoing hostilities.
A planning session between US Secretary of State Secretary Rubio and his Russian counterpart Sergei Lavrov was due to be held this week - but the White House clarified the two had had a "constructive" conversation and that a face-to-face session was no longer "needed".
The administration withheld additional specifics on the reason the negotiations had been postponed.
Trump had raised the possibility of a Budapest summit over the phone with Putin, a just prior to meeting Ukraine's President Zelensky in the Oval Office.
Various sources suggested his meeting with Zelensky had been a "heated exchange", with those familiar claiming the president had pressured him to relinquish extensive regions of eastern Ukraine as part of a agreement with Russia.
However, on Monday the American president endorsed a truce plan endorsed by Kyiv and EU officials to pause the hostilities on the existing battle lines.
"Freeze the lines in its current state," he said.
Moscow has repeatedly pushed back against halting the existing front lines.
The Russian government was solely focused on "long-term, sustainable peace", Russia's foreign minister commented on this week, indicating that pausing conflict would simply constitute a temporary ceasefire.
The "fundamental issues" of the war demanded attention, the Russian diplomat stated, using Kremlin shorthand for a series of comprehensive conditions that encompass the acknowledgment of full Russian sovereignty over the eastern region as well as the demilitarisation of Ukraine – a unacceptable proposition for Ukraine and its Western allies.
Zelensky commented discussions about the front line were the "commencement of dialogue" but that Russia was "doing everything" to avoid diplomacy.
He also said the exclusive issue that could cause Russia to "pay attention" was that of the delivery of extended-range arms to Ukraine.
The Russian president's unplanned conversation with the US leader recently occurred before rumors that the United States was considering delivering extended-range cruise missiles to Ukrainian forces that could possibly hit deep into Russia.
The Ukrainian leader said it was the weapons consideration that had compelled Moscow to enter into dialogue. The discussion regarding the weapons systems had proven to be a "significant input" in diplomacy", he commented.