The move from Tehran is seen as a tit-for-tat response to recent European sanctions against Iranian officials linked to a crackdown on nationwide protests.
Poland and Lithuania are delaying the adoption of the package, proposed earlier this month by Commission President Ursula von der Leyen, over concerns it would water down some existing restrictive measures.
"The war has to end. Then there have to be reparations and there has to be a democratic government before we can ever look at Russia the same again", said the Kremlin critic.