Atlanta selected Suarez's contract from Triple-A Gwinnett on Tuesday.
Suarez will make a spot start Tuesday in the first game of a doubleheader against the Nationals. The left-hander has pitched well lately at Gwinnett, posting a 2.70 ERA and 23:6 K:BB over 20 innings covering his last four starts. Suarez could be sent back down to Gwinnett after Tuesday's start.