Tehran insists deal is possible if US president abides by preconditions agreed with Witkoff and Kushner

Iran enters critical talks on its nuclear programme with the US on Thursday, insisting a deal is in reach as long as Washington sticks by its willingness to concede Iran’s symbolic right to enrich uranium, allow Tehran to dilute its stockpile of highly enriched uranium, and not to impose controls on Iran’s ballistic missile programme.

The three preconditions for success are seen as critical by Iranian diplomats, but it remains unclear whether Trump accepts these parameters.