STORY: The law, backed by the ruling Georgian Dream party, would require any organizations receiving more than 20% of their funding from overseas to register as "foreign agents," or face substantial fines.

Critics have said it is reminiscent of a 2012 Russian law that has since been used to crack down on dissent.

Some of the protesters gathered outside the parliament building carried European Union and U.S. flags, and shouted: "No to the Russian law".