Ahmadinejad's close relationship with Khamenei the senior cleric who has the last word in the Islamic Republic's affairs was strained two weeks ago, according to some analysts, over the president's attempt to sack his intelligence minister, a move vetoed by the supreme leader.
Since then Ahmadinejad has missed two cabinet meetings something some foreign analysts said was akin to a boycott.
Speculation began to circulate that Ahmadinejad no longer enjoyed the unqualified support of Khamenei, something the government denied. Khamenei had endorsed his re-election in June 2009 in a vote the opposition said was rigged.
The Tehran Stock Exchange lost 6 percent in value over the last three trading days due to the political uncertainty.
Ahead of Sunday's cabinet meeting, the head of national broadcaster IRIB told news agencies that Ahmadinejad would express his allegiance to Khamenei.