Prince Hamza with his mother. File

Hamza was placed under house arrest last year, was accused in April 2021 of trying to destabilise the country in a foreign-inspired plot, but was spared punishment after pledging allegiance to the King.

A royal court statement said the monarch had approved a recommendation by a royal family council that decreed restrictions on the estranged prince's movements, place of residence and communications.

A royal chief adviser, Bassem Awadallah, and a minor royal were sentenced to 15 years in jail for their involvement in the alleged plot.

Jordan's King Abdullah addresses the media.

Hamza, 42, was named Crown Prince when King Hussein died in 1999 and Abdullah became king, but lost that title five years later when Abdullah installed his own son as heir as stipulated under the constitution.

The state said in a letter to Jordanians he had exerted "utmost self restraint, tolerance and patience" with his younger half brother who never gave up over many years his "delusion" of taking over the throne.

Hamza would now be deprived of the scope to allow him to become again a threat to his country, having exhausted all chances to repent, the monarch said in the letter.

"We will provide Hamza with all that he requires to live a comfortable life, but he will not have the space he once abused to offend the nation, its institutions, and his family, nor to undermine Jordan’s stability," the monarch said.

Hamza's movements had been eased after he issued an apology in March in which he pledged not to act against the interests of Jordan's rulers.