Hi @Joan9; welcome to our Community!
Depending on your account's plan you may be able to restore it through Dropbox using these steps.
Just note that Dropbox Basic, Plus, and Family accounts can recover any file edits or deletions made within the last 30 days while this extends to the last 180 days for Dropbox Professional and Business accounts.
I hope this helps and please let me know if you have any more questions, Joan.