Sainsbury (PEC Zwolle), Juric (Roda JC) and Asian Cup final hero Troisi (Al-Ittihad) all return to the Socceroos' fold after injury ruled them out of the last round of qualifying matches against Bangladesh and Tajikistan.
"It is a sign of the depth we are creating that we bring these three guys back into the squad for the Jordan game," Postecoglou said.
"All three played a major part in our Asian Cup success and after finding fitness and regular club football they are ready to come back in."
Socceroos captain Mile Jedinak was not included in the squad to face Jordan in Amman on October 8 due to a combination of injury and a lack of first team action at Premier League club Crystal Palace.
Socceroos squad for Jordan World Cup qualifier
Luke Brattan, Nathan Burns, Tim Cahill, Alex Cisak (gk), Jason Davidson, Tarek Elrich, Adam Federici (gk), Eugene Galekovic (gk), Tomi Juric, Mathew Leckie, Massimo Luongo, Ryan McGowan, Matt McKay, James Meredith, Mark Milligan, Aaron Mooy, Tommy Oar, Tom Rogic, Trent Sainsbury, Matt Spiranovic, James Troisi, Alex Wilkinson, Bailey Wright.