I apologized for being late
I must apologize for the delay.
I apologize for the delay in the reply.
I apologize for the late thank you.
Please excuse me for coming late.
I humbly apologize for the delayed shipment.
I apologize for those late payments.
I am sorry about this delay.
I'm dreadfully sorry to be late.
I am sorry to be late for the deadline.
I am terribly sorry for guiding you late.
I am sorry that the announcement is late.
I apologize for the delayed notification.
I am sorry that my submission has become late.
I apologize for the delay.
I must apologize for the delay.
Forgive me for being late.