It was a major surprise when he was included in the 30-man squad, and the Toon defender admitted it was like "a bolt out of the blue".
But he has not made the cut for the World Cup.
Fabricio Coloccini: 'No one from the technical staff spoke to me. But it's the coach's decision.
'Like any player, I am saddened by this decision. But I give my full support to the players for them to take Argentina to the top. I can't be selfish and wish the boy all the best.
'Looking beyond this difficult moment, I will be Argentina's No 1 fan and I hope they will come home champions.
'Luckily, the people around me say that I should be calm because I did very well in England and anything is possible for me. I'm still young and I can return to play in the World Cup.
'The coach makes these decisions and they must be respected. It's not only me who's out of the group, but many players.'