The Dry will face the Truro Bearcats who completed their own 3-0 sweep of the Kentville Wildcats Thursday night in the other league semifinal.
The best-of-seven championship series schedule has yet to be determined.
Saturday’s game 3 in Sydney was a true pitcher’s duel as the Dry won 1-0 in 12 innings. Jason Mosher earned the win, going 11-and-a-third innings.
Dartmouth took five of the seven meetings with the Bearcats during the regular season.