Triangle Heart 3 (とらいあんぐるハート3 Toraianguru Hāto 3) is an eroge video game written by Masaki Tsuzuki and released by JANIS Computer Software on published::December 8, 2000. It is part of the Triangle Heart series of games. The third installment in particular is notable for its spin-off anime series, Magical Girl Lyrical Nanoha, which itself originated from a mini-scenario on a merchandise CD titled Lyrical Toy Box.