I feel regretful about the little one.
I feel regretful for your child. I understand what difficult this situation can be. I kindly request, accept my sincere regrets.
I feel sorry about your child. I know how difficult such a situation can feel. I kindly request, accept my sincere apologies. I genuinely feel remorseful for the inconvenience caused. I feel hoping that your child will pardon me.
I’m sorry little one