President Obama was not disappointed by Iranian President Hassan Rouhani's decision to reject an offer for an informal meeting Tuesday at the United Nations, White House press secretary Jay Carney told reporters.

"He was open to the possibility of an informal encounter with President Rouhani and remains [so]," Carney said.

The White House spokesman refused to "delve into analysis of Iranian politics" and speculate why Rouhani had opted against a meeting but did caution that watchers should not "over-interpret" the snub.