PSG were due to face struggling Nantes on the weekend of March 13-15th, between their first leg against Chelsea on March 11th and the return match at Stamford Bridge on March 17th.
Liam Rosenior's Chelsea will play a difficult Premier League match against Newcastle three days before the second leg.
"At the request of Paris Saint-Germain, in order to best prepare for their two-legged tie against Chelsea... the LFP board of directors, in agreement with Nantes, have decided the Paris Saint-Germain-Nantes match will be played the week of April 20th," the French league said in a statement Saturday.
"The exact date and time of the match will be determined later."
PSG also successfully requested to have a Ligue 1 game against Nantes delayed last season, between the two legs of their Champions League quarter-final victory over Aston Villa.