Jenkins, 30, pulled out of the latest leg of the ITU World Series in Hamburg on Sunday with a foot injury.
"I'm obviously devastated. I was very proud to be selected to represent Wales and was looking forward to racing on a tough, honest triathlon course in Strathclyde," Jenkins said in a statement.
"I will get more information from the specialist this week but with a grade two tear of my Planter Fascia, it's almost certain that I won't be racing again this season."
England's Jodie Stimpson is now the favourite for the Commonwealth Games triathlon, which takes place on July 24.