A high-stakes hearing over whether to bar evidence from Luigi Mangione’s murder case was postponed Friday — because the accused assassin said he is sick.

“Apparently the defendant is ill today,” Judge Gregory Carro said right before the fourth day of testimony in the marathon pre-trial proceeding was set to begin.

“Yes,” Mangione’s lawyer Marc Agnifilo responded. Mangione’s ailment is unclear.

The hearing will resume Monday morning.

Mangione , 27, is trying to block prosecutors from showing jurors the key evidence that Altoona, Pennsylvania, cops found in his backpack after arresting him — including the gun he allegedly used to execute UnitedHealthCare CEO Brian Thomson in Midtown last December.

The preppy University of Pennsylvania graduate is also attempting to convince the ju

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