The Liverpool defender was a high-profile omission following a bust-up earlier this year during a friendly with Hungary, in which Cacic accused Lovren of refusing to warm up after being left out of the first XI.
Nevertheless, Croatia kicked off their Group C campaign with a victory this afternoon as Luka Modric's 41st-minute volley was enough to down Turkey in Paris.
That being said, Bilic, who spent seven years manging the Croatian national team, says that Cacic was wrong to omit the talented Premier League defender.
"When you're in England and you're warming-up only three players can warm up, the players go and they come back by themselves."
Lovren for so long looked like a Liverpool flop following a £20 million switch from Southampton in 2014, but the 26-year-old has, to his credit, looked a vastly improved defender since Jurgen Klopp replaced Brendan Rodgers as Reds boss in October.
He no longer seems like the clumsy, clunk-footed buffoon who Liverpool fans developed quite a disdain for, and that Lovren would have certainly helped out Croatia in France.