The Ukrainian delegation has arrived in Belovezhskaya Pushcha in two helicopters for talks with Russia, a TASS correspondent reports.
The Russian delegation arrived at the site of negotiations earlier on Monday.
Ukrainian presidential office adviser Mikhail Podolyak said the third round of negotiations was scheduled to begin at 17:00 Moscow time.
Russian and Ukrainian delegations have already held two rounds of talks in Belarus. Presidential aide Vladimir Medinsky leads the Russian panel of negotiators. Earlier, he said that Russia was prepared to spare no time holding talks with the Ukrainian side in a bid to come to terms.