"What we will be doing right now and what we will be promoting is the maintenance of the weaponry systems which we have already bought, such as S-300, Tor-M1 and Kornet," Kammenos said on the sidelines of a conference on global security in Moscow.
"Our arms purchases will be limited to procurement of new ammunition to replace the old one," he added.
The minister also expressed hope that the EU sanctions regime against Russia would end soon, so that Athens and Moscow "could continue with other agreements."
Greece is the only NATO member state that has the Russian-made S-300 long-range surface-to-air missiles systems in service. The Greek military successfully test-fired the air defense system for the first time in 2013 after buying two batteries in 1999.
The Greece Army also operates at least 25 Tor-M1 air defense systems, and has some 200 launchers and over 1,100 Kornet anti-tank guided missiles.