sadly
US /ˈsæd.li/
UK /ˈsæd.li/

1.
in a sad manner; unhappily
:
•
She shook her head sadly.
•
He looked at the empty swing set sadly.
2.
it is a sad fact that; unfortunately
:
•
Sadly, the old library had to close down.
•
Sadly, he never achieved his dream.