Regretfully

I regretfully informed my friend that I couldn't lend him any money.

Regretfully, the museum was closed for renovation during our visit.

Regretfully, I have to cancel our meeting due to unforeseen circumstances.

Regretfully, I won't be able to attend the party.

She regretfully admitted to making a mistake on the project.

The landlord regretfully informed the tenant that the rent was going to be increased next month.

Regretfully, the concert was canceled due to the lead singer's illness.

She regretfully informed her parents that she would not be coming home for the holidays.

He regretfully declined the job offer due to his lack of qualifications.

He regretfully admitted to cheating on the exam.

He regretfully returned the puppy to the shelter as he was not able to provide it with enough care.

Regretfully, the flight was delayed for two hours.

Regretfully, the company had to lay off a significant number of employees.

Regretfully, I cannot attend the party tonight.

I regretfully informed the landlord that I would not be renewing my lease.

She regretfully informed her friends that she couldn't make it to the party.

I regretfully informed my boss that I couldn't meet the deadline.

Regretfully, the company had to lay off a few employees due to the recession.

She regretfully told her friend that she could not lend her the money she needed.

She regretfully declined the invitation to the wedding.

He regretfully apologized for his behavior at the party.

Regretfully, I won't be able to attend the party tonight.