Mohammad, 27, has been serving for eight consecutive years after enlisting in 2010, but will finally go home next month.
"I feel like I just won a huge battle," said Mohammad, who hails from Syria's second city Aleppo.
"I called my family this morning and told my mom to congratulate me as I'd been discharged. She was surprised and didn't know what to say," he told AFP from Damascus, where he is now deployed.
Before Syria's conflict erupted in 2011, men 18 and older had to serve between 18 months and two years in the armed forces, after which they remained part of the reserves.
But when war broke out, anyone enlisted remained deployed on active duty. The regime initially lost swathes of territory and its 300,000-strong army was nearly halved by deaths, injuries and defections.
Russian air strikes, local militiamen and fighters from Iran, Iraq, Lebanon and elsewhere have helped it recapture much of the territory it lost.
Mohammad was expecting to serve until 2012, but ended up fighting for years longer along several fronts, including the Eastern Ghouta rebel bastion outside Damascus.
"We've been dreaming of this moment for a long time, and now the dream has become reality," he said.
Syrian state media did not report the decision, while local outlets did not specify how many troops it would impact.
The Britain-based Syrian Observatory for Human Rights war monitor estimated that nearly 15,000 soldiers and reservists would be affected.
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