Lieberman also said on Tuesday that Israel is ready to intervene militarily if there is any indication that Hezbollah is accessing chemical weapons in violence-wrecked Syria.
His comments came amid reports that Syrian government forces had moved chemical weapons to airports near its borders - a day after Damascus warned that it could use them if Syria is attacked by an external force.
"In the moment we see that the Syrians transfer chemical and biological weapons to Hezbollah, this is a red line for us and from our point of view it's a clear casus belli," Lieberman said in Brussels
"We will act decisively and without hesitation or restraint," he added. "It will be a completely different ballgame and we hope for the understanding of the international community."
The European Court of Justice has ruled that Israeli goods made in Jewish settlements in the occupied West Bank cannot be considered Israeli.
This means goods made by Israelis or Jews in the West Bank cannot benefit from a trade deal giving Israel preferential access to EU markets.
EU import duties on Israeli goods from the settlements may now be imposed, making them less competitive.