I feel regretful for you.
I am regretful about your child. I understand what difficult such a situation can feel. Please, accept my sincere condolences.
I'm apologetic for your child. I know how challenging this situation might seem. I kindly request, take my sincere apologies. I genuinely feel remorseful the trouble caused. I'm expecting that you will pardon me.
I feel regretful for you.
I am regretful about your child. I understand what difficult such a situation can feel. Please, accept my sincere condolences.
I'm apologetic for your child. I know how challenging this situation might seem. I kindly request, take my sincere apologies. I genuinely feel remorseful the trouble caused. I'm expecting that you will pardon me.