The defeat follows losses to Scottish giants Glasgow Rangers at Portman Road and Ujpest in their first game of the two game tour of Hungary.
Home side sub Shiminic Marius scored the only goal of the game with 20 minutes to go, rounding second choice goalkeeper Shane Supple before slotting the ball into the net.
Striker Nicky Forster missed out on the action due to picking up a slight injury against Ujpest whilst Dean Bowditch picked up a knock in the game against Diosgyor to join French midfielder Jimmy Juan and former West Ham midfielder Kevin Horlock on Town's injury list.
Ipswich Town: Price (Supple, 46) Wilnis (Casement, 46) Richards, De Vos (Magilton, 46), Collins, Naylor, Westlake (McDonald, 46), Garvan, Currie, Bowditch (Trotter, 52), Parkin.