Heavy rain throughout the day put the game at Bootham Crescent in doubt, and although the kick-off was moved back to 8.00pm to give as much time to get standing water cleared, the referee deemed the pitch unplayable.
Josh Morris's Fleetwood will face York City in the rearranged first leg this Monday night at 7.45pm, the second leg takes place at Fleetwood's Highbury Stadium on Friday evening.
Whilst Morris was without a match, other Rovers players out on loan did feature on Saturday.
Jordan Slew grabbed his first goal on his last appearance for Ross County as they ended the season with a 3-2 win over Partick Thistle.
With both sides safe from the drop, Slew opened the scoring for the visitors, sliding the ball home on 22 minites. Just after the break the Staggies' lead was doubled thanks to Yoann Arquin's headed goal.
However County, featuring fellow Rover on loan, Yann Songo'o were pegged back as Thistle grabbed goals through Lyle Taylor and George Moncur. But there was still time for a winner as Melvin de Leeuw's strike secured victory for Derek Adams' side with 13 minutes to go.
The win sees Ross County end the season in seventh place, in total Jordan Slew made 20 appearances in the league scoring once, whilst Yann Songo'o appeared 17 scoring on three occasions.
Over in Spain it was a Saturday evening to forget for Rayo Vallecano as they were defeated 4-0 by Villareal at Camp El Madrigal.
Ruben Rochina played the full match for Vallecano as the visitors ended the match with ten men but by then the damage had already been done.
Rayo Vallecano end their season next Sunday at home to relegation threatened Getafe.