The most recent information on the delivery date for Cthulhu Wars OS3 is from the Petersengames.com Marchthulhu sale email announcement that went out March 20, which says:
We Haven't Forgotten You!
If you are still waiting for a game from a previous Kickstarter, we have good news--Now that Chinese New Year is over, our manufacturers have given us their shipping schedule!
The following dates are when we expect your games to be delivered:
April 2018 = Sandy Petersen's Cthulhu Mythos for Pathfinder book
July 2018 = Cthulhu Wars Onslaught 3
July 2018 = Evil High Priest
August 2018 = The Gods War
So July would be a better bet than June.