The National Organization for Marriage (NOM) has been rejected a third time in its attempt to intervene in a case challenging Oregon's ban on gay marriage.

In a brief order, the full Ninth Circuit Court of Appeals in San Francisco denied NOM's request.

It is the latest in a string of losses for NOM which started in May when it attempted at first to intervene in the case and later delay implementation of U.S. District Judge Michael McShane's ruling striking down Oregon's ban as unconstitutional.

McShane denied NOM's attempt to intervene in the case. A denial by a 3-judge panel of the Ninth Circuit followed. On Monday, the full court concurred.

“[T]he National Organization for Marriage's petition for rehearing en banc is denied,” the court said.

NOM had argued that it should be allowed to defend the state's ban because Oregon officials had stopped.

In a blog post, NOM President Brian Brown said the case was “an ugly example of inappropriate cooperation between the Attorney General and the gay marriage lobby, both of whom want to redefine marriage in contravention of the overwhelming decision of the people to define marriage as the union of one man and one woman.”

“The people of Oregon are entitled to a defense of their decision on marriage rather than being abandoned in Court,” Brown added.

NOM is also involved in legal attempts to resurrect North Carolina's ban, which was also declared invalid by a federal judge.