2018 Copa do Brasil Third Stage

The 2018 Copa do Brasil third stage was the third stage of the 2018 Copa do Brasil football competition. It was played from 28 February to 15 March 2018. A total of 20 teams competed in the third stage to decide ten places in the fourth stage of the 2018 Copa do Brasil.

Format
In the third stage, each tie was played on a home-and-away two-legged basis. If tied on aggregate, the away goals rule would not be used, extra time would not be played and the penalty shoot-out would be used to determine the winner.  Host teams were settled in a draw held on 21 February 2018, 11:00 at CBF headquarters in Rio de Janeiro.

Matches
All times are Brasília time, BRT (UTC−3) 


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Match 61
Tied 1–1 on aggregate, Atlético Paranaense won on penalties and advanced to the fourth round.

Match 62
Internacional won 4–0 on aggregate and advanced to the fourth round.

Match 63
Avaí won 3–1 on aggregate and advanced to the fourth round.

Match 64
Goiás won 2–1 on aggregate and advanced to the fourth round.

Match 65
Tied 0–0 on aggregate, Ponte Preta won on penalties and advanced to the fourth round.

Match 66
São Paulo won 5–0 on aggregate and advanced to the fourth round.

Match 67
Vitória won 3–1 on aggregate and advanced to the fourth round.

Match 68
Tied 2–2 on aggregate, Atlético Mineiro won on penalties and advanced to the fourth round.

Match 69
Ferroviário won 2–1 on aggregate and advanced to the fourth round.

Match 70
Náutico won 3–1 on aggregate and advanced to the fourth round.