The team has recalled right-handed reliever David Carpenter from Triple-A Gwinnett to take his spot.
Ayala, 35, pitched with the Orioles last season and was a part of their very successful bullpen. The team did not disclose specifics of his disorder, simply stating that it was anxiety.
Ayala had a 3.86 ERA in 4 2/3 innings for the Braves this year, but only fills a middle-relief role. The team has a strong bullpen, so they likely won't miss Ayala too much. Things like this could end up taking a bit longer in terms of recovery, so their depth is certainly a good thing in that respect.