"One can express regret in this regard but no one expected that everything will be simple and quick," President Vladimir Putin's spokesman Dmitry Peskov told reporters.
He said that the Kremlin hoped that it would "soon" become clear when and how the talks would resume.
"It is unlikely that someone expected immediate results from the first round. This would probably be short-sighted," Peskov said, AFP reported.
"Of course it is obvious that moving forward will be difficult and we are hoping that the break will be followed by another round of these truly difficult talks."
UN special envoy Staffan de Mistura announced Wednesday the suspension of peace talks to end Syria's civil war as Syria's army secured a major battlefield victory against militants and Russia vowed no let-up in airstrikes.
The United States and France condemned the Russian bombing around Syria's second city of Aleppo.
Russian Foreign Minister Sergei Lavrov said Wednesday that airstrikes would continue until terrorist organizations like the Daesh (ISIL) group in Syria are defeated.
Russia's defense ministry said earlier that a military adviser had been killed in Syria by Daesh shelling.
Peskov confirmed his death but said the Kremlin would not disclose his name.