[Your Name] [Your Address] [City, State, ZIP] [Email Address] [Phone Number] [Date] [Recipient's Name] [Recipient's Title] [Company/Organization Name] [Address] [City, State, ZIP] Subject: Apology for Missing Deadline Dear [Recipient's Name], I hope this letter finds you well. I am writing to offer my sincerest apologies for missing the deadline for [project/task] that was expected to be completed by [deadline date]. As someone who values punctuality and professionalism, I deeply regret any inconvenience or disruption this may have caused. I understand the importance of keeping commitments and meeting deadlines, and I take full responsibility for my failure to deliver [project/task] on time. I assure you that this is not a reflection of my usual work ethic or dedication to our partnership. Unfortunately, due to unforeseen circumstances [provide brief explanation if necessary], I encountered difficulties in completing the task within the given timeframe. I am fully committed to rectifying this situation and ensuring that it does not happen again in the future. To that end, I have already taken necessary steps to prioritize this project and allocate additional resources to meet the revised deadline. I understand the impact of my delay on your team and acknowledge the frustration it may have caused. I assure you that I am fully dedicated to delivering exceptional quality work that meets your expectations, despite the setback. Please accept my apologies once again for the inconvenience caused. I value our working relationship and appreciate your understanding and patience during this time. Rest assured, I am working diligently to complete the project as soon as possible, and I will keep you informed of its progress. I would appreciate the opportunity to discuss this matter further and understand any concerns or feedback you may have. Please feel free to reach out to me at [your phone number] or [your email address] at your convenience. Thank you for your understanding, and I look forward to resolving this matter and continuing our valuable collaboration. Sincerely, [Your Name] [Your Title/Position] [Company/Organization Name]