any inconvenience

  1. We regret for any inconvenience that this may cause you.
  2. We apologize for any inconvenience that this may cause you.
  3. We are sorry for any inconvenience that this may cause you.
    Please correct the above and suggest the best to use.
    Thanks.
  1. We regret any inconvenience that this may cause you.
  2. We apologize for any inconvenience that this may cause you.
  3. We are sorry for any inconvenience that this may cause you.

Beeesneees,
Could I say as below?:
“We are sincerely sorry for any inconvenience that this may cause you.”
Thanks.

As you are only adding an adjective to ‘sorry’, then it should be fairly obvious that you can.

Beeesneees,
I am adding an adverb - ‘sincerely’ to an adjective ‘sorry’.
Is it OK? Thanks.

It should be fairly obvious that you can.