The Knights of the Ku Klux Klan yesterday canceled plans for a national rally announced for Nov. 6 in Washington, citing both a lack of organization and competition from an anti-Klan rally scheduled the same day.

"We just felt it wasn't enough time to get our people together," Tom Robb, the Klan group's national chaplain, said from Harrison, Ark.

Asked if the rally was canceled partly out of fear of the counter-demonstration by an anti-Klan coalition, Robb said, "I'd be foolish, or you'd think I was lying, if I said we didn't consider that."

"That was a consideration," Robb said, "but certainly that was not a factor in stopping us . . . . We didn't think we could get enough people there." Robb said his group would reschedule the rally for spring. Sponsors of the anti-Klan rally said they would go ahead with their demonstration.

Meanwhile, the Maryland chapter of the Invisible Empire of the Ku Klux Klan is awaiting permission from the Maryland-National Capital Park and Planning Commission to use a Montgomery County park for its "Support Your Police" rally Nov. 6. Spokesman John Hoover said the parks director would make a decision on the request "within five days."