Meaning of “unfortunately” - Learner’s Dictionary

unfortunately

adverb us uk /ʌnˈfɔːtʃənətli/
Unfortunately, the bird had flown off by the time I could get my camera.Unfortunately, the drug also has some serious side effects.Unfortunately, many of the paintings were destroyed in the fire.Unfortunately, tomorrow's meeting has been cancelled.Unfortunately, tickets have already sold out.

A2 used to say that you wish something was not true or that something had not happened:

I'd love to come, but unfortunately I have to work.

(Definition of “unfortunately” from the Cambridge Learner’s Dictionary © Cambridge University Press)