BERLIN — Austria and nine Balkan states on Wednesday agreed on several measures to choke off the flow of refugees from Greece, effectively imposing their own response to the migrant crisis while the European Union has been paralyzed over what to do.

The moves, by the foreign and interior ministers of the 10 countries, come amid Europe’s preparations for another surge in people fleeing war and poverty in the Middle East and beyond as winter wanes and the weather turns warmer.

The practical effect of the steps they agreed on during a meeting in Vienna on Wednesday will probably be to keep more of the migrants in Greece, the primary point of entry into the European Union for people coming from Afghanistan, Iraq, Syria and other troubled countries.