The Blues could feature three club debutants against Essendon on Sunday, including two playing their first AFL game.
Former Giant Rhys Palmer, 2015 first-round draft pick Harry McKay and 2016 No.61 draft pick Tom Williamson have been named in the Blues' extended squad following impressive performances for the Northern Blues at the weekend.
The trio joins Sam Kerridge as Carlton's inclusions, with Dennis Armfield (omitted) making way.
Meanwhile, Essendon has been boosted by the return of first-choice ruckman Matthew Leuenberger.
Heath Hocking, Matt Dea, James Stewart and Mitch Brown are the Bombers' other inclusions, with Ben Howlett (hamstring) and Michael Hartley the confirmed outs at this stage.
Carlton's 25-man squad will be reduced to 22 at 5pm on Friday ahead of Sunday's match against the undefeated Bombers, which kicks off at 3:20pm AEST.
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Carlton's extended squad for Round 3:
| Backs | 15. Sam Docherty | 22. Caleb Marchbank | 43. Simon White |
| Half-backs | 6. Kade Simpson | 17. Sam Rowe | 20. Lachie Plowman |
| Centreline | 11. Sam Kerridge | 9. Patrick Cripps | 35. Ed Curnow |
| Half-forwards | 39. Dale Thomas | 23. Jacob Weitering | 1. Jack Silvagni |
| Forwards | 46. Matthew Wright | 41. Levi Casboult | 5. Samo Petrevski-Seton |
| Followers | 8. Matthew Kreuzer | 4. Bryce Gibbs | 3. Marc Murphy (C) |
| Interchange from: | 30. Charlie Curnow | 16. Billie Smedts | 10. Harry McKay |
| 24. Rhys Palmer | 26. Harrison Macreadie | 33. Jarrod Pickett | |
| 31. Tom Williamson |
In: Palmer, Kerridge, Williamson, McKay
Out: Dennis Armfield (omitted)
New: McKay (Gippsland Power), Williamson (North Ballarat Rebels)
