World Bulletin / News Desk
Khawla Mattar said Brahimi met Assad but gave no details about the meeting.
Brahimi has angered the Syrian opposition by saying that Iran, Assad's main backer during the war, should attend Geneva.
Rebels and the political opposition say that any negotiations should be based on Assad's removal.
Assad and Iran, however, have said they will only go to talks that set no preconditions.
"Of course, everyone knows Iran's efforts to help a political solution to the Syrian crisis. Iran's absence from this meeting does not benefit the meeting," he said.
The Syrian conflict began in early 2011 as a peaceful protest movement against four decades of Assad family rule, but has degenerated into a sectarian civil war and forced millions to flee.