Triathletes Non Stanford and Helen Jenkins have been ruled out of their event, while cyclist Becky James will miss out in Glasgow, and Davies has claimed that the original target of 27 medals could now be tough to reach.
"Twenty-seven is going to be a stretch when you lose three world champions," Davies is quoted as saying by BBC Sport. "Hopefully the rest of the team have been isolated from it.
"I feel mainly sorry for the individuals concerned. They would have been so proud to wear the kit and represent their country."
Wales claimed 19 medals in Delhi four years ago.