Iran has dealt a significant blow to Pakistan's mediation efforts by announcing it will not attend talks with the United States in Islamabad. Foreign Ministry spokesperson Esmail Baghaei stated that Tehran has 'no plans' for new negotiations, citing a lack of seriousness from the US and a deepening trust deficit with both Washington and Islamabad. This decision follows US President Donald Trump's announcement of a potential visit to Pakistan for talks, which had raised hopes for a diplomatic restart after a recent ceasefire. Iran's position has been further complicated by the US seizure of an Iranian-flagged cargo ship in the Strait of Hormuz, which has heightened tensions. Baghaei warned that any renewed aggression from the US or Israel would provoke a military response from Iran. The mediation efforts led by Pakistani Prime Minister Shehbaz Sharif and Army Chief Asim Munir have faced criticism from Tehran, which claims that Pakistan has failed to secure a credible framework for negotiations. As a result, the diplomatic track appears effectively halted, raising concerns about the future of US-Iran relations.