NXT TakeOver: Brooklyn III was the 16th NXT TakeOver and third TakeOver: Brooklyn professional wrestling livestreaming event produced by WWE. It was held exclusively for wrestlers from the promotion's NXT brand division. The event aired exclusively on the WWE Network and took place on August 19, 2017, at the Barclays Center in Brooklyn, New York as part of that year's SummerSlam weekend.

Five matches were contested at the event. In the main event, Drew McIntyre defeated Bobby Roode to win the NXT Championship. On the undercard, Asuka retained the NXT Women's Championship against Ember Moon, which was also Asuka's last match on NXT, and Sanity (represented by Alexander Wolfe and Eric Young) defeated The Authors of Pain (Akam and Rezar) to win the NXT Tag Team Championship. The event is notable for the debut of Adam Cole and the reunion of the team reDRagon after both members Bobby Fish and Kyle O'Reilly made individual debuts on NXT. reDRagon attacked both teams in the tag team championship match after Sanity's victory, then confronted Drew McIntyre during his celebration to serve as a distraction for Cole, who ambushed McIntyre from behind to end the show.