I understand your disappointment.

Meaning

I recognize your feeling of sadness or dissatisfaction.

Examples

• John: I didn't get the promotion.
• Alice: Oh, I'm so sorry to hear that. <b>I understand your disappointment</b>.
• John: It's just... I worked so hard.
• Alice: I know. But please don't let this discourage you. Again, <b>I understand your disappointment</b>.