There was a deadline to submit an application. But I could not submit due to holiday in our institute and again unavilability of official staffs after the holidays. So I would like to write a letter expressing all these problem in a very short sentense. For example "I could not attend the meeting due to some unavoaidable circumstances."
The expression force majeure conveys the concept of something that is not under your control and you are not responsible for:
- an event or effect that may be considered impossible to control or anticipate.
The Free Dictionary
- I could not attend the meeting due to force majeure.
I could not attend the meeting due to circumstances beyond my control
is the way I see people expressing this idea. (It's not as strong as force majeure, which in my experience is usually reserved for things like hurricanes or earthquakes.)