Matteo (pictured) picked up a knock during Leeds' 2-1 win over Ipswich Town on Sunday and is unfit enought to meet up with the squad.
Scotland boss Craig Brown is not fully aware of the injuries to the players and he admitted their loss is a blow.
"Their injuries are still being looked at but it is disappointing," said Brown.
Brown is unlikely to call up any replacements as he still has 23 members of his squad available for the game.
