Four protesters arrested during a Yom Kippur demonstration near the Soviet Embassy were found guilty yesterday in D.C. Superior Court of demonstrating within 500 feet of an embassy.

The four demonstrators, including two Christian clergymen, were standing in on the Jewish holy day for Jewish protesters who usually stage daily silent demonstrations across the street from the embassy to protest treatment of Jews in the Soviet Union.

Demonstrating within 500 feet of an embassy is a misdemeanor offense, but police traditionally have allowed the silent protesters to remain across the street from the embassy as long as there are no signs or chanting. Police said they arrested the four protesters on Sept. 25 because they held signs displaying anti-Soviet slogans.

Judge Joseph M. Hannon sentenced the four demonstators to a 15-day suspended prison term and fined them $50. Hannon, however, said execution of the sentence would be stayed pending an appeal.

Sentenced yesterday were the Rev. Eugene F. Brake, 51, a Catholic priest; Amy L. Anderson, 22, who works at a shelter for homeless women at St. Peter's Lutheran Church; the Rev. John Steinbruck, 54, of Luther Place Memorial Church, and John W. Robitscher, 25, an Episcopal layman.