The Argentina Football Association confirmed the 30-year-old defender has a hamstring problem and although he is staying with the squad for the time being, coach Alejandro Sabella has drafted in Leandro Desabato.
A statement of the AFA’s official website said: “Fabricio Coloccini has a hamstring injury in the femoral biceps of his right leg. He will travel with the squad to continue treatment with the team doctor.”
Argentina face Paraguay in Cordoba, Coloccini’s home city, on Friday and then travel to Peru on Tuesday sitting in third place in the South American World Cup qualifying table but just two points behind leaders Chile with a game in hand.
But of more concern to Pardew will be the 30-year-old’s readiness to play at Everton on his return.
The Magpies face the Toffees at Goodison Park on Monday September 17 with their defensive resources having been severely depleted during the opening weeks of the domestic season. Ryan Taylor is facing months on the sidelines with a cruciate ligament injury while James Perch missed the 1-1 draw with Aston Villa because of a neck problem and Danny Simpson limped out of that game after damaging a hamstring.
Mick McCarthy praised Mustapha Carayol after the winger climbed off his sickbed to score the winner in Ipswich's 1-0 victory at Preston.
Rotherham boss Paul Warne admitted his side's dramatic victory over Doncaster was fairytale stuff.
Jos Luhukay thought Sheffield Wednesday did not have luck on their side after they were beaten 4-2 by Aston Villa in a thrilling game.
Hamilton boss Martin Canning praised goalkeeper Gary Woods after his side's last-gasp 2-1 victory over Partick Thistle.
Derby manager Gary Rowett urged his side to defender better after they were held to a 3-3 Championship draw at struggling Reading.
Nigel Adkins praised the Hull fans for their continuous support during the 1-0 win over Sheffield United but has called for an end to the protests as the Tigers