Criticisim of the Soviet incursion into Afghanistan continued to mount around the world today and the staunchly anticommunist Saudi Arabian government began organizing a conference of Islamic nations to discuss the move, diplomatic sources said.

Saudi Arabian Foreign Minister Prince Saud, seeking a united Moslem stand against Moscow's use of 30,000 to 40,000 troops in Moslem Afghanistan, met in Riyadh with representatives of most Arab and Moslem nations.

Arab diplomatic sources in Beirut said the Saudis are trying to set up the conference for foreign ministers for sometime in mid-January.

Another Moslem leader, Egyptian President Anwar Sadat, also criticized the Soviet move and said his country is ready to provide "facilities only" to the United States if it needs them to help a gulf country. Sadat did not elaborate on what "facilities" are, but he ruled out the possibility of U.S. troops using Egyptian military bases.

In Europe, Romanta, always a maverick in the Soviet bloc, implicitly criticized the Soviet moves. A signed editorial in the Communist Party organ Scienteia, also appealed for an end to the use of military force and violations of independence.

"Failure to observe these fundamental demands can lead to a further worsening of the international situation, with unforeseeable consequences," the editorial said.

Albania, which is at odds with the Soviet Union, also criticized the Soviets. The Albanian news agency ATA said Soviet troops were using napalm against civilians.

Students in Bombay and Bonn marched on the Soviet consulate and embassy, respectively. More than 200 students in Dacca, Bangladesh, burned effigies of Soviet President Leonid Brezhnev and Premier Alexei Kosygin. e

British Prime Minister Margaret Thatcher canceled a visit by Soviet Foreign Minister Andrei Gromyko.

The Dutch government expressed "deep" concern. Prime Minister Andries van Agt said, "The government rejects the argument of the Soviet government that this intervention is justified because it took place at the request of the government of Afghanistan, for it is clear that the intervention had the purpose of overthrowing the established government and replacing it with a regime that is imposed on the country by means of the armed interference of the Soviet Army."

Meanwhile, French President Valery Giscard d'Estaing described the reception given to U.N. Secretary Gen. Kurt Waldheim by Iranian authorities as unthinkable and totally inadmissible.

Waldheim left Tehran yesterday after a stormy two-day visit that did not resolve the three-month old crisis over U.S. Embassy hostages. The secretary general was not permitted to meet revolutionary leader Ayatollah Ruhollah Khomeini.

"France cannot ignore the gravity of the situation in the Middle East of which Afghanistan is one aspect," Giscard added.