The 6-foot-9, 230-pound Doumbouya played last season in France's top pro league. He does not turn 19 until December. A native of Conakry, Guinea, Doumbouya moved to France when he was a year old. He did not begin playing basketball until he was 12.
"That's good. That means there's upside," Pistons executive Ed Stefanski said. "Youngest kid in the draft. We're excited."
Doumbouya he averaged 17.8 points per game for France at the 2016 FIBA U18 European Championship. He was the first of two picks the Pistons controlled in the first round.
Detroit agreed to trade Jon Leuer to the Milwaukee Bucks in exchange for Tony Snell and the 30th pick, according to a person with knowledge of the deal. The person spoke on condition of anonymity because the trade was not yet official. Trades can't be completed until the new league year starts July 6.
The Pistons also had a second-round pick, the 45th overall.
Detroit made the postseason this year but was swept by Milwaukee in the first round. The Pistons have been building around the trio of Blake Griffin, Andre Drummond and Reggie Jackson, and with Griffin and Drummond under big contracts, the Pistons' flexibility has been limited. They could use a productive addition or two from the draft, and Doumbouya has potential.
"He played against men in a good league over there," Stefanski said. "So we're happy."
Kyle Milling, his coach with Limoges in the French league, described Doumbouya as "very raw" but said he can defend four positions.
The Pistons did not have a first-round pick last year.