Mark McVeigh will remain in hospital under observation for a fifth night but is expected to be released tomorrow (Friday).
General manager of football operations said the 29-year-old is recovering well but is unlikely to attend the game on Saturday.
"Mark is feeling much better which is great and he has had plenty of visitors from the club which has kept his spirits up," Hamilton said.
"Naturally he is very disappointed about not being able to play against one of our fiercest rivals this weekend. Hopefully he will be back and ready to play in Round 4."