The meeting is the fifth between the two foreign ministers during the past few days.
The two ended their latest round of talks in Paris Jan 16 after they held three rounds of talks in Geneva on Wednesday.
Zarif met on Friday with his Swiss counterpart Didier Burkhalter.
In the meeting, the two sides discussed bilateral relations and regional developments, including Syria and exchanged views on nuclear talks.
Zarif is to depart Switzerland for Saudi Arabia on Saturday morning to attend funeral ceremony for the late Saudi King Abdullah.
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