A spokesman for Ivanka Trump said she had been sitting in the back of the room and then briefly joined the main table when the president stepped out. The president of the World Bank addressed the meeting, which was about African migration and health — areas that would benefit from a facility that Ivanka Trump and the World Bank had announced shortly before the meeting, the spokesman said.

G-20 leaders are allowed to bring staff into the room for some of the meetings, and when other leaders stepped out during today’s session, their seats were briefly filled by others. Ivanka Trump serves as an unpaid adviser to her father, as an assistant to the president.