All three parties described the meeting as "constructive and substantive".
They will discuss the plan for eastern Ukraine by phone with President Petro Poroshenko on Sunday.
The plan is thought to be an attempt to revive a September ceasefire, signed in Minsk in Belarus. Since then the rebels have seized more ground, raising alarm in Kiev and among Ukraine`s backers.
Fighting has left nearly 5,400 people dead since April, the UN says. Russia is accused of arming and reinforcing pro-Russian separatists - claims it denies.
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