Lula was expected to meet with presidents Vladimir Putin of Russia and Xi Jinping of China on the sidelines of the event.
It added that Lula would take part in the event by videoconference and return to his normal schedule later in the week.
According to a statement from the Sirio-Libanes Hospital in Sao Paulo, the president received a blunt trauma to the back of the head.
BRICS was initially founded in 2006 by Russia, China, India, and Brazil to boost trade and investment in each other’s economies.
“The BRICS have a unique chance to shape the trajectory of global development,” Lula said last year.

‘Head injury’ forces Brazil’s Lula to cancel BRICS summit trip