It appears that Greece is also looking for new submarines. TKMS and Hanwha are both submitting their designs as contenders. Sweden and France are also in the running (A26 and Blacksword Barracuda respectively).
France offers Blacksword Barracuda to Greece for submarine replacement program with lithium ion propulsion cruise missiles and 2035 entry into service
www.armyrecognition.com
Personally I would think the KS-III and the Barracuda as being to large for the Mediterranean, but I could be wrong. On the other hand the KS-III in Greek service would probably give the Turks some sleepless nights.