President Anwar Sadat has urged that President Carter, who comes to Egypt Wednesday for talks, pressure Israel for additional concessions on the question of a Palestinian homeland.

Sadat, in an interview with Mexican television that was published here yesterday, said Carter should take a more active role in breaking the deadlock between Israel and Egypt - particularly on the thorny question of a homeland for Palestinian refugees.

The Egyptian Parliament, in a separate statement today, called on Carter to prove his commitment to human rights by supporting the right of the Palestinians to self-determination.

Sadat said he wants Carter to pressure Israel into taking a more flexible stance on the Palestinian issue, which threatens to deadlock the current Egyptian-Israeli effort to achieve a Middle East peace settlement this year.

"America should mount pressure on Israel, particularly regarding the Palestinian question, which is the core of the problem, Sadat said.

The statement by Parliament said:

"The ratification of the national rights of the Palestinian people constitutes an essential basis for the establishment of a durable peace. These rights should include the right of self-determination and any peace plan that omits this right cannot lead to a just and durable peace."

It added that "having faith in the principal role which the United States should play, we are eagerly awaiting for the U.S. administration to clarify its position on the right of self-determination for the Palestinian people. This is one of those basic human rights which the American president raises the slogan of defending."

Sadat in his interview also said that Egypt has "run out of concessions" in its negotiations with Israel.

He said that Israeli withdrawal from the occupied territories does not constitute an Israeli concession because the lands are Arab in the first place.

Presidential officials here said Sadat has some new ideas on how to resolve the Palestinian issue and will not necessarily demand immediate creation of on independent Palestinian state.

"Self-determination does not necessarily mean the immediate creation of an independent Palestinian state. Egypt can accept the idea of a homeland as an initial step that will eventually lead to a state over a specific period of time," the Egyptian officials said stressing that "the Palestinians must have the right to determine whether to be independent or establish a link with Jordan - which Egypt still favors."

Egyptian Foreign Minister Mohammed Ibrahim Kamel appealed to the United States today to inject fresh momentum into the Egyptian-Israeli talks."Americans have a vital role in helping the parties," Kamel said.

In other Middle East developments:

In Syria, which opposes Sadat's peace initiative with Israel, tens of thousands demonstrated in Homs, shouting anti-American and anti-Egyptian slogans. It was the fourth large demonstration in Syria in three weeks.

Jordan's King Hussein returned to Amman after talks with President Carter in Tehran Sunday, stopping briefly in Kuwait where he briefed an envoy of Sadat on his talks with Carter.

West German officials said President Carter will meet for about 10 minutes Wednesday with Chancellor Helmut Schmidt, who is visiting Egypt.

Jacques Chirac, the Gaullist leader in France and mayor of a Pris, expressed astonishment and regret to the U.S. embassy that Carter's visit to Paris does not include talks with him. Carter, however, is to meet with Socialist opposition leader Francois Mitterand, a rival of Chirac in the March election.