LONDON — Britain has passed legislation that allows the government to strip terrorism suspects of their citizenship even if it renders them stateless, taking the country’s already sweeping powers to revoke nationality a step further.

After four months of wrangling, the House of Lords, the Parliament’s upper chamber, approved on Monday a clause in a new immigration bill that removes a previous restriction on leaving individuals without citizenship. The bill became law on Wednesday, after receiving royal assent.

Britain has been one of the few Western countries that can revoke citizenship and its associated rights from dual citizens, even native-born Britons, if they are suspected or convicted of acts of terrorism or disloyalty. The government has stepped up its use of this tactic in recent years. In two cases, suspects have subsequently been killed in American drone strikes.

The new rules will broaden these so-called deprivation powers to include Britons who have no second nationality, provided that they were naturalized as adults. If the home secretary deems that their citizenship is “seriously prejudicial to the vital interests of the United Kingdom,” it can be taken away, effective immediately, without a public hearing. A suspect whose citizenship rights have been stripped has 28 days to appeal to a special immigration court.