The Leeds squad have headed out to Austria for a pre-season training camp that was to include three friendly matches, with the first on Sunday against Ingolstadt.
But the game will not now go ahead due to security issues, with Ingolstadt revealing in a statement:
"The friendly against Leeds United, which is scheduled for 16th July 2017 (Sunday), will be cancelled. On the ground, the local authorities said it was for security reasons."
It remains to be seen whether Ingolstadt or Leeds can re-schedule another game at such short notice, as both teams look to build up towards the new season.