How to Politely Decline a Meeting Invitation Due to Prior Commitments

Dear 'Colleague's name',

I hope this email finds you well. I wanted to reach out and inform you that I won't be able to attend the meeting you have scheduled. I apologize for any inconvenience this may cause.

Unfortunately, I already have prior commitments and have already arranged my work schedule accordingly. I understand the importance of the meeting, but I'm afraid I won't be able to participate.

If there are any specific topics or discussions that you would like me to contribute to, please let me know, and I'll be happy to provide my input or any necessary information before the meeting.

Once again, I apologize for any inconvenience caused and appreciate your understanding.

Best regards, 'Your name'