The team, which announced the move Friday afternoon on Twitter, has recalled outfielder Teoscar Hernandez from triple-A Buffalo.
Donaldson has been bothered by a “dead arm” issue at times this season. His throws across the diamond from third base have lacked their usual zip.
The 2015 American League most valuable player was limited in spring training by a shoulder issue. He started just seven pre-season games at third base.
Donaldson is batting .239 with three homers and nine RBIs over 12 games. He hit .270 last season with 33 homers and 78 RBIs over 113 games.
Hernandez played 26 games for Toronto last season. He posted a .261 average with eight homers and 20 RBIs.