1. I was disappointed when I found out that the concert was canceled.
2. She couldn't help but feel disappointed when her team lost the championship game.
3. The new restaurant turned out to be a disappointment with its poor service and mediocre food.
4. I hope I didn't disappoint you with my performance in the play.
5. It was disappointing to see that the project didn't meet our expectations.
6. The lack of effort put into the presentation was a major disappointment to the boss.
7. I was disappointed to learn that my favorite store was closing down.
8. The movie trailer looked promising, but the film itself was a huge disappointment.
9. Despite his best efforts, he couldn't help but disappoint his parents once again.
10. The rainy weather on our vacation was a disappointment, but we made the best of it.