England's Ross Barkley in action with Australia's Joshua Risdon
Roy Hodgson named his provisional 26-man squad for Euro 2016 last week as the Three Lions gear up for the tournament.
He must remove three from that selection on May 30th when he names the final group that will travel to France.
England's Fabian Delph and Raheem Sterling during training
At present it appears that Manchester City midfielder Fabian Delph will drop out after picking up an injury, but beyond him it is hard to name who else will miss out.
Waddle though, believes that there are doubts over Barkley and Drinkwater, while it is also hard to predict what will happen with Daniel Sturridge.
“There’s question marks over Barkley, there’s question marks over Drinkwater. There’ll still be four or five worried about a call,” he told BBC Sport.
"It’s very hard to predict who is not going. Sturridge is very hard to predict. Roy’s been very loyal to his squad - he might say to Sturridge: ‘if you’ve got a chance of going then I’ll take you’.”
England's Danny Drinkwater during training
It will certainly be interesting to see which players that Hodgson elects to cut from the current England squad.
Much is likely to rest on the fitness of the players, with questions marks still surrounding both Sturridge and Arsenal midfielder Jack Wilshere.
What has not helped is the continued form of Manchester United youngster Marcus Rashford, whose debut goal against Australia and general fine form is now making him almost certainty to go.
England's Marcus Rashford applauds fans as he is substituted off for Ross Barkley (not pictured)