太遗憾了

what a shame

→ 太
phrase Rare #27,254
what a shame An exclamation expressing strong regret or disappointment. 太 intensifies the adjective 遗憾, and 了 marks the resulting emotional state.
CH: 你不能参加聚会,太遗憾了!
EN: It's such a shame that you can't come to the party!

我觉得太遗憾了

I think it’s such a shame.

这也太遗憾了

That’s such a shame.

— 触不可及 (2011)

真是太遗憾了

What a shame.

— 海上钢琴师 (1998)

太遗憾了

What a shame.

— 死亡诗社 (1989)