Lexus has discontinued the IS sedan, RC coupe, and CT hatchback in the United Kingdom, presumably as a first step to stop sales of the three models throughout Europe. From Autocar:
All three models are now listed as having “limited availability of stock”, with a spokesperson confirming no more will be brought into the country. Lexus stock is held centrally rather than in different dealer networks, unlike most volume brands.
The only exception is the RC F performance derivative, which will continue to be imported and remain on sale for longer than the mainstream versions of the coupe.
There are no plans to release the updated IS sedan recently released in the USA, though Autocar mentions that a crossover smaller than the UX is “in the works” for an possible 2021 debut.