Dear {Recipient},

My apologies for waking you {in the middle of the night/early in the morning/from your nap/etc.}. You're right, {my question/the discussion/etc.} could've waited. I should've been more patient and considerate.

I hope you were able to get back to sleep without any problem. I promise not to wake you again unless it's really important.

Best,
{Your Name}

Dear {Recipient},

I'm sorry for waking the baby {last night/this afternoon/etc.}. I know how difficult it can be sometimes to get the little one to sleep; I feel so bad for undoing your efforts. I should've {kept my voice down/noticed the squeaky toy on the floor/etc.}.

I hope you were able to put the baby back to sleep without a hitch. I will be more {quiet/careful} when I'm around {him/her} next time.

Sincerely,
{Your Name}

Dear [Name],

I am writing to apologize for my unplanned interruption this morning. I know that I woke you up too early and I regret that I did not think it through before I acted.

I understand that it was inconsiderate of me to not take into account the time of day and the fact that you were likely still sleeping. I should have been more aware and respectful of your needs and I apologize for my thoughtlessness.

I understand that it was not an appropriate way to start the day and I am sorry for the inconvenience that I caused. I will work to be more mindful of the situation and more aware of the time in the future.

I hope that you can forgive my mistake and that you can accept my apology. I will do my best to ensure that this does not happen again.

Sincerely,

[Your Name]

Dear [Name],

I am writing to apologize for the unplanned disturbance that occurred on [date]. I understand that it was disruptive and inconvenient and I regret that it happened.

The disturbance was caused by [reason]. It was not intentional and I take full responsibility for it. I understand that it caused a disruption to your day and I apologize for any inconvenience it may have caused.

I want to assure you that I am taking steps to ensure that something like this does not happen again. I am working with [relevant parties] to develop a plan to prevent similar occurrences in the future.

I understand that this incident was disruptive and I apologize for any inconvenience it may have caused. I am committed to ensuring that something like this does not happen again.

Once again, I apologize for the unplanned disturbance that occurred on [date]. I take full responsibility for it and I am committed to ensuring that something like this does not happen again.

Sincerely,

[Your Name]

Dear [Name],

I am writing to apologize for waking you up last night. I know how important sleep is, and I regret that I disrupted your rest.

I understand that you had been looking forward to a peaceful night of sleep, and I feel terrible that I was the cause of your unwanted awakening. I should have been more mindful of your needs and given you the space to rest.

I can only imagine how frustrating it must have been for you to be woken up in the middle of the night. I know that it can be difficult to get back to sleep after being disturbed, and I'm sorry for causing you any further stress.

I have learned from my mistake and I will be more mindful in the future. I will do my best to ensure that I am not the cause of any further disturbances.

Once again, I apologize for waking you up last night. I hope that you can forgive me and that you can get a good night's sleep tonight.

Sincerely,
[Your Name]