WASHINGTON — Khaled el-Masri’s frightening tale of abduction and torture at the hands of the CIA can be discussed everywhere it seems — except in American courts.

The American government acknowledged to Germany, Mr. el-Masri’s adopted country, that it mistakenly seized him. The details of his claim — being beaten, stripped, and drugged by masked men he believes to be CIA agents — are well known. German prosecutors found his story credible enough that they issued arrest warrants for the agents who allegedly were involved.

No matter, the Supreme Court indicated yesterday. Without any comment, the justices said they would not give a hearing to Mr. el-Masri, agreeing with lower federal courts that tossed out his lawsuit on the grounds that secrets would be disclosed if it went forward.

The Bush administration had urged that course, saying that even if Mr. el-Masri’s case has been discussed in public, government officials have never done so.

President Bush and others have confirmed the existence of the CIA’s extraordinary rendition program, but the facts central to Mr. el-Masri’s claims “concern the highly classified methods and means of the program,” the government said. By refusing to hear Mr. el-Masri’s case, the high court passed up an opportunity to review the doctrine of state secrets, which has been employed by this administration more frequently than its predecessors.

Mr. el-Masri, 44, a German citizen of Lebanese descent, says he was a mistaken victim of the CIA program. He was detained while entering Macedonia on New Year’s Eve 2003 and eventually transferred to a CIA-run prison known as the “salt pit” in the Afghan capital of Kabul.

Five months after his seizure, Mr. el-Masri says, he was dumped on a hilltop in Albania and told to walk down a path without looking back. The lawsuit against a former CIA director, George Tenet, unidentified CIA agents, and others sought damages of at least $75,000. The court’s action dismayed Mr. el-Masri’s lawyers.

“We are very disappointed,” Manfred Gnijdic, Mr. el-Masri’s attorney in Germany, told the Associated Press in a telephone interview from his office in Ulm.

“It will shatter all trust in the American justice system,” Mr. Gnijdic said, charging that America expects every other nation to act responsibly, but refuses to take responsibility for its own actions. “That is a disaster,” Mr. Gnijdic said. Mr. el-Masri’s case centers on the rendition program, in which terrorism suspects are captured and taken to foreign countries for interrogation. Human-rights activists have objected to the program. Mr. Bush has repeatedly defended the policies in the war on terror, saying as recently as last week that America does not engage in torture.

Mr. el-Masri’s lawsuit had been seen as a test of the administration’s legal strategy to invoke the doctrine of state secrets and stop national security suits before any evidence is presented in private to a judge.