Left-wing President Salvador Sanchez Ceren said in a statement Saturday that Rousseff's ouster had "the appearance of a coup d'etat."
In a speech, the leader of the Central American nation explained: "We have analyzed the situation and taken the decision to not recognize the interim government of Brazil because there was political manipulation."
He said he was recalling El Salvador's ambassador to Brazil, who had already received orders not to attend any official ceremony involving Rousseff's interim replacement, Vice President Michel Temer.