Which Diablo game introduced the Demon Hunter as a playable class?

Diablo III introduced the Demon Hunter as a playable class.

The Demon Hunter is a ranged combat class built around bows, crossbows, traps, and shadow-themed abilities. Its design combines elements associated with the Rogue from the original Diablo and the Amazon and Assassin from Diablo II, while adding a distinct identity centered on vengeance against demons.

The class was available when Diablo III launched in 2012. It uses Hatred for offensive abilities and Discipline for defensive or tactical skills, creating a dual-resource system unlike the resource models of most other classes.

The Demon Hunter is sometimes confused with the Rogue because both use ranged weapons and appear in the broader Diablo universe. Rogue is the ranged-focused class introduced in Diablo IV, whereas Demon Hunter belongs to Diablo III and Diablo Immortal.