Find date before 3 days and not in holiday

I have a more question.
If I want to find date before 3 day (not count holiday)

*I read date holiday by file excel as below.

holidays.xlsx (13.1 KB)
WorkingORnot.xaml (12.9 KB)

Example : today 20/05/2021
but in file holiday 20/05/2021 as holiday.
I want to find by count the days back 3 day.
Output : 17/05/2021

Please guide me about it.
@sarathi125 @prasath17

@fairymemay ,

I think I have replied you in another thread for the same issue