Unionist parties have joined an Orange lodge in hitting out at a Parades Commission ruling which has barred a march from passing a North Belfast interface.
Ballysillan lodge's proposed parade on Saturday was a "clear breach" of a 2016 agreement with a local residents' group, the parades body said.
The lodge planned to march along Crumlin Road past the mainly nationalist Ardoyne area and Twaddell Avenue, where parading disputes have previously sparked serious disorder.
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The Parades Commission banned the march from most of its planned route, ruling that it must turn back upon reaching the Crumlin Road junction with Wheatfield Gardens.
It said the proposed parade was an "egregious disregard for the six years of peace" resulting from the 2016 agreement between the Crumlin Ardoyne Residents' Association and three lodges.
"It serves only to heighten tensions in a period of political instability and risks serious public disorder," it added.
The commission said that as part of the 2016 deal, CARA agreed to raise no objections to existing morning parades, of which there are five each year.
CARA raised concerns about Saturday's plans, saying it is a new march that breached the letter and spirit of their agreement.
The commission said it received no representations from the organiser or anyone on their behalf.
But in a post on Facebook, the lodge said: "Once again we're being denied our right to walk the King's highway due to threats of republican violence."
It said it "can't understand (the Parades Commission's) logic", as it allows several other Orange parades along the same route.
DUP councillor Marc Collins said: "This must be the wonderful 'new ireland' that republicans talk about, where unionists and our culture will apparently be welcome.
"Except here is a parade of one band and one lodge, which would take maybe five minutes to pass Ardoyne, turned down, seemingly on the threat of 'widespread public disorder'."
TUV councillor Ron McDowell described the decision as "reprehensible".
He said it "sends entirely the wrong message to society at large" and argued the commission "illustrates that it is unfit for purpose".
Sinn Féin North Belfast MLA Gerry Kelly welcomed the Parades Commission ruling.
He said: "This parade was clearly in breach of an agreement in 2016 between the Crumlin Ardoyne Residents' Association and the three Ligoniel lodges which has brought almost seven years of peace to the Crumlin Road and eased community tensions."
The Orange Order was approached for comment.
Around 60 people and one band are due to take part in the march, which is scheduled to begin at 11.30am and is described as a "feeder parade" for the annual Whiterock parade.
In its ruling, the commission encouraged all parties in the parading dispute to "enter into dialogue to achieve an accommodation which reflects the needs of the local communities".
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