In the garden, Arminda sees Sandrina and casually mentions her engagement to Belfiore. Stunned, Sandrina faints. When the Count arrives, Arminda leaves him to watch over Sandrina and rushes off to fetch her smelling salts. Belfiore is shocked to find that the gardener's girl is none other than his lost Violante (Finale: "Numi! Che incanto è questo?"). Arminda returns and is surprised to come face to face with Ramiro. Sandrina awakens and finds herself looking directly into the eyes of Belfiore. The Podestà enters and demands an explanation, but no one knows quite what to say. Sandrina wavers but decides not to reveal herself as Violante, while Arminda suspects that she's being deceived. The Podestà blames everything on Serpetta, who in turn blames Sandrina, and Ramiro is only certain of the fact that Arminda still does not love him.