Card Rulings:Number 49: Fortune Tune

OCG Rulings

 * If Number 49: Fortune Tune is sent from the field to the Graveyard, even if you have 1 or no Level 3 monsters in your Graveyard, its effect activates and creates a chain. (However, since you cannot target 2 Level 3 monsters, no targets are selected, and the effect is not applied.)