According to several sources, including Riad Hijab, a former Syrian premier who defected in August 2012, he is also one of the staunchest supporters of the Syrian government of Bashar al-Assad in the Syrian Civil War.
Menurut beberapa sumber, termasuk Riad Hijab, mantan Perdana Menteri Suriah yang membelot pada Agustus 2012, Soleimani merupakan salah satu pendukung utama dari Bashar al-Assad selama Perang Saudara Suriah.