The U.S. Supreme Court refused yesterday to consider the appeal of an extradition order handed down earlier this year for Franklin Peroff, a former underworld figures turned government informer.

Peroff, whose testimony in the early 70s helped break open the "French connection" narcotics smuggling ring, was ordered extradited to Sweden last February by U.S. District Court Judge Calvitt Clarke after the Swedish government issued a warrant for his arrest in connection with an alleged fraudulent stock transfer in 1972.

Peroff lost an earlier appeal of the order last spring in the Fourth U.S. Circuit Court of Appeals.

A justice Department spokesman said it was not yet certain what would happen to Peroff because of the Supreme Court's decision. Peroff's lawyer, Philip J. Hirschkop of Alexandria, said his client now faces deportation, but that he had "some legal maneuvers" in mind that might prevent the extradition.

Hirschkop added that he is considering asking the Supreme Court to reconsider the case since, he said, he has recently discovered some new evidence that he said shows that some of the documents presented by the Swedish government were false.

Peroff has sued the government for failing to give him federal protection.