hemanshudhuria
Hi,
I think IDP ielts help in this case.
https://image.ielts.idp.com/assets/favicon/favicon.ico
IDP IELTS
Hearing or speaking difficulties
We can make special arrangements for your IELTS test if you have hearing or speaking difficulties.
Try reaching out to the IDP ielts administration way before your exam, maybe they can arrange something for you.
If not, if you can inform the examiner and take some kind of certificate from a doctor, he/she won’t examine you based on stuttering.
In my opinion, IELTS is quite fair exam that judges you only on the quality of your English, nothing else.
All the best.