The 32-year-old defender returned from the Republic of Ireland's campaign in Poland and Ukraine with a problem which required surgery, and is currently working his way back to fitness.
Villa last month expressed their disappointment at the situation, but have now issued a clarification.
A club statement said: "In a press release dated August 1, 2012, Aston Villa Football Club made a number of assertions and comments about the medical treatment received by Richard Dunne during his service with the Ireland team during the European Championships.
"We wish to acknowledge that Richard Dunne received the highest standard of medical care before and during the Championships and apologise to those involved in providing his treatment if any other impression was erroneously given."
- Sports & Recreation
- Aston Villa Football Club
- Richard Dunne