SAN FRANCISCO  Concerned about the national ramifications of same-sex marriages in California, attorneys general from 10 states have asked the California Supreme Court to stay its decision legalizing the marriages, which are set to begin on June 17.

In a letter to the court’s chief justice, Ronald George, the attorneys general  all Republicans  asked that the marriages be put off until after the November election, when California voters are expected to vote on a measure that would ban same-sex marriages.

The attorneys general said that allowing same-sex marriages now could unnecessarily open the door to legal challenges from gay residents of other states who get married in California. Upon returning to their home states, the newlyweds could demand equality in everything from tax-filing status to testimonial privileges in civil suits, the attorneys general said.

“Absent a stay of the mandate in this case, that number will certainly be very large indeed,” Mark L. Shurtleff, the Utah attorney general, wrote on behalf of the group in a letter delivered on Thursday and released publicly on Friday. “And unnecessarily so if a majority of California’s voters favor in November the proposed ballot measure.”