US stock futures fall as Iran rejects US deal proposal and Trump delays Iran deal deadline

US stock futures dropped following a sharp sell-off, driven by geopolitical tensions as Iran rejected a 15-point US proposal, calling it biased towards American and Israeli interests. President Trump extended the Iran deal deadline to April 6, pausing planned strikes on Iranian energy infrastructure amid ongoing negotiations. The market also reacted to mixed corporate news, with Unity Software surging on strong revenue guidance, while Southland Holdings and Datacentrex saw significant declines after poor financial results and discounted public offerings. Investors remain cautious amid inflation concerns and geopolitical risks, with the Federal Reserve likely to keep interest rates steady in April.