If you are unable to except an invitation due to unforeseen circumstances, here is a sample apology letter due to unforeseen circumstances.
Subject: Apology for Unforeseen Circumstances
I would like to thank you for sending me an invite for [event/interview/job offer], it means a lot. I regret to inform you that I won’t be able to accept it due to unforeseen circumstances.
I truly appreciate your gesture and extend my sincere apologies. I would like to wish you continuous success. Thank you again for considering me capable enough.
Sample Apology Letter Without Admitting Guilt
Apology Letter Unable To Attend Wedding
Apology Letter Will Not Happen Again
Letter To A Friend Apologizing For Your Bad Behavior
Apology Letter To Your Daughter
Apology Letter To Neighbor
Sample Apology Letter For Vandalism
Apology Letter Asking For Forgiveness
Sample Apology Letter For Returned Check
Sample Apology Letter To Court For Driving Offence