Thank you for your follow up.
I cannot comment on your specific case, but does the answer would depend on how the written response from the seller would be warded.
If it is worded as an offer to give concessions / credit toward the purchase price based on the findings contained in the inspection report, it would not be considered legally a "counter-offer", but a "good will" credit /concession offer by the seller, which would not void the original contract and seller will be able to enforce the terms of the original real estate contract and if the seller fails to complete transaction and close on the property, would be able to pursue legal claim for damages / earnest money deposit.
So, it is important to consult and hire an experienced local real estate attorney, who can review the entire situation, including all the documents, and hopefully help you reach a resolution with the seller or pursue claim against the realtor for any potential professional malpractice.
You can find an experienced and skilled local real estate law attorney by using this established and reputable attorney information / referral websites:
When, choosing a local attorney to represent you, it would be a good idea to choose someone who has a practice exclusively dedicated to real estate law, has at least 10 years of experience and handled similar matters and also regularly practices before the court located in the jurisdiction where your matter might be heard.
I wish you the best of luck!