The 2015 Copa do Brasil Third Round will be played from 20 May to 22 July 2015 to decide the 10 teams advancing to the knockout rounds.[1] Different than the first two rounds, in this round the away team that wins the first match by 2 or more goals do not progress straight to the next round avoiding the second leg. The order of the matches was determined by a random draw.[2] This phase had a pause during the 2015 Copa América.
|}
----Palmeiras won 1–0 on aggregate.
----Figueirense won 3–2 on aggregate.
----Santos won 4-3 on aggregate.
----Flamengo won 3-1 on aggregate.
----Tied 3–3 on aggregate, Ituano won on away goals.
----Tied 3-3 on aggregate, Coritiba won on penalties.
----Vasco won 6-3 on aggregate.
----Ceará won 2-1 on aggregate.
----Tied 1-1 on aggregate, Grêmio won on penalties.
----Paysandu won 3-2 on aggregate.