Six teams went into the hat for two places in the first qualifying round and a Danish club - as yet unknown until the Danish season ends - and Mainz of Germany were drawn out.
Head Coach Martin Jol said: "It is a disappointment, but we knew it was just a chance.
"It makes us all the more determined to secure European football for our club and supporters through strong performance in league and cups next season.
"We just missed out this time and, to take a positive, it will give myself and the players more time to prepare for what we hope will be a season where we make the next step or two in our development."
We have missed out on a place in the UEFA Cup via Sunday's Fair Play draw.