Assad meets Russia envoy, hails 'partners in victories'
Russia was a key player in the recent bloody regime assault on the Syrian area of Eastern Ghouta, where weeks of intense bombing killed around 2,000 people.
The meeting comes less than a week after Assad met Putin at Russia's Black Sea resort of Sochi.
Putin at the time insisted foreign armed forces would withdraw from Syria but did not provide any details.
In addition to Russian forces, there are Iranian, Lebanese, and Iraqi fighters battling on behalf of Assad in Syria.
Lavrentiev later told journalists the withdrawal of foreign troops should be done "as a whole" and include both Iranians and allied Lebanese militia Hizballah.
But Mekdad shot back on Wednesday, saying those fighters were in Syria to fight terrorism.
"This topic is not even on the agenda for discussion," he told RIA Novosti state news agency.
Seven years of fighting has left more than 500,000 people, the vast majority civilians, dead from Syrian regime and Russia shelling and air raids.
Russian fighter planes have launched near daily air raids on opposition towns and cities.