Big Brother Brasil 3 was the third season of Big Brother Brasil which premiered January 14, 2003, on the Rede Globo.
The show was produced by Endemol Globo and presented by Pedro Bial. The season was officially confirmed since 2001 as part of the original contract between international Endemol and Rede Globo that provided seasons until 2008.
The grand prize was R$500.000 without tax allowances, with a R$50.000 prize offered to the runner-up and a R$30.000 prize offered to the housemate in third place.
The winner was 31-year-old congressional aide Dhomini Ferreira from Goiânia, Goiás.
There were fourteen Housemates competing for the grand prize, an increase over the two previous seasons. The season lasted 78 days, an increase of one week over the previous season. This season introduced the Power of Immunity.
Among the contestants was the Miss Brasil 2002, Joseane Oliveira. Rules of the Miss Brasil contest forbid participation of married women, and when Joseane participated, she stated she was single. Due to the overexposition in the BBB, some magazines discovered she was married since before winning the beauty contest. The marriage being proved, Joseane was stripped of her crown, and Thaisa Tomsem was crowned Miss Brasil 2002.
Also, contestant Dilson, not knowing Joseane was married, tried to start a romantic relationship with her during the show. Due to her refusals, he felt unmotivated and left the show voluntarily. Harry replaced him at January 26, and became the first contestant not to enter the show at the first day.
The reunion was hosted by Pedro Bial and aired on April 6, 2003. All the former housemates, except Dilson, attended. Alan ended up winning the "Big Boss Prize" which awarded R$50.000 over Andrea with 86% of the fans' vote.
(ages stated at time of contest)
In 2010, Joseane Oliveira returned to compete in Big Brother Brasil 10, she finished in 17th place in the competition.
In 2013, Dhomini Ferreira, the winner from this season, returned to compete in Big Brother Brasil 13, he finished in 15th place in the competition.
In 2020, Dhomini Ferreira, appeared to compete in ', he finished in a joint 7th place in the competition, Sabrina Sato was the show host.
In 2023, Juliana Alves appeared in Dança dos Famosos 20, she finished in 9th place in the competition.
In 2025, Juliana Alves and Sabrina Sato, appeared at the ' as one of the interviewed housemates.
In 2025, Dhomini Ferreira appeared with his wife in Power Couple Brasil 7, they finished as runner-up from the competition.