US-Iran Diplomatic Efforts Collapse as Islamabad Talks Stall

United States President Donald Trump has cancelled a planned visit by his envoys Steve Witkoff and Jared Kushner to Pakistan, where indirect talks between the US and Iran remain deadlocked over issues including the blockade of the Strait of Hormuz. The cancellation signals a significant setback in diplomatic efforts to resolve the conflict that has spilled into the larger Middle East region, causing the worst global energy crisis since the 1970s and risking a global recession.

Trump Cancels Envoys' Visit to Pakistan

"If they want to talk, all they have to do is call!!!" Trump wrote on his social media platform Truth Social on Saturday, signalling that Washington for now would not send negotiators to Pakistan, the country mediating between the longtime adversaries. The US president told reporters in Florida that he scrapped his envoys' visit because the talks involved too much travel and expense to consider what he called an inadequate offer from the Iranians.

After the diplomatic trip was called off, Trump claimed Iran "offered a lot, but not enough." On Truth Social, he also wrote that there was "tremendous infighting and confusion" within Iran's leadership, stating "Nobody knows who is in charge, including them." Trump added, "Also, we have all the cards, they have none!"

Iran's Position on Blockade and Negotiations

In Tehran, Iranian President Masoud Pezeshkian reiterated that his government will not enter negotiations while the US maintains a blockade on Iranian ports. In a phone call with Pakistani Prime Minister Shehbaz Sharif on Saturday night, Pezeshkian said Washington "should first remove operational obstacles, including the blockade," before any new talks can begin, according to Iranian news agencies.

Meanwhile, during his visit to Islamabad on Friday, Iranian Foreign Minister Abbas Araghchi held separate meetings with Pakistan's army chief, Field Marshal Asim Munir, and Sharif. In a post on Telegram, Araghchi said their discussions covered regional dynamics and Iran's non-negotiable positions without disclosing specifics. He added that Tehran intends to engage with Pakistan's mediation efforts "until a result is achieved."

Pakistan's Continued Mediation Efforts

Despite hardening public positions from Washington and Tehran, Pakistan's political and military leadership is continuing to mediate, two Pakistani officials said on Sunday, according to The Associated Press news agency. They described the indirect ceasefire contacts as still alive but fragile.

Al Jazeera's Kimberly Halkett, reporting from Islamabad, said Pakistani officials are underscoring that the expected return of Araghchi to Islamabad is seen as a "hopeful sign." "What they hope is that this will in fact be something that can be incremental in the process and will advance forward," she reported.

Global Energy Crisis Escalates Amid Conflict

The conflict has caused the worst global energy crisis since the 1970s, with significant implications for international markets. The Strait of Hormuz, through which one-fifth of the world's oil and liquefied natural gas supplies were shipped before the war began, has become a central dispute in the conflict.

Iranian forces have essentially blocked the Strait of Hormuz, capturing commercial vessels, while the US has intercepted or detained ships suspected of violating its naval blockade of Iranian ports. The naval blockade is seen by Iran as a breach of the ceasefire. Tehran has warned that reopening the Strait of Hormuz is impossible as long as the blockade remains in place.

The critical waterway lies within the territorial waters of Iran and Oman. Iran insists on sovereignty over the waterway and has floated the idea of levying tolls while Washington demands full freedom of navigation. The Gulf nations, which export most of their petroleum through the strait, have opposed the Iranian plan to impose tolls.

Middle East Tensions Widen as Blockade Dispute Persists

The US-Iran conflict has spilled into the larger Middle East region, including Lebanon, with both sides continuing to accuse each other of ceasefire violations. While the truce has held for the most part since it began on April 8 after nearly six weeks of US and Israeli strikes on Iran and retaliatory Iranian attacks, tensions remain high.

Another key issue in the negotiations is the debate over Iran's stock of enriched uranium. The US and Israel are pushing for zero uranium enrichment and have accused Iran of working towards building a nuclear weapon while providing no evidence for their claims. Iran has insisted its enrichment effort is for civilian purposes only, though it has enriched uranium to 60 percent, a level far higher than what is needed for civilian use.

Prospects for Lasting Ceasefire Remain Uncertain

With neither Washington nor Tehran showing much willingness to soften their positions, prospects for a diplomatic breakthrough in the US-Israeli war on Iran and securing a lasting ceasefire remain stalled. After repeated threats of restarting the war if Iran did not heed Washington's demands, Trump extended the ceasefire on Tuesday without a set deadline, saying he was in no rush to conclude a peace deal with Iran.

Iranian Foreign Minister Araghchi, after departing Islamabad on Saturday, travelled to Oman where he discussed ways to end the conflict with Sultan Haitham bin Tariq al-Said, according to state media. He was then scheduled to continue on to Russia, with Iran's IRNA news agency saying Araghchi is expected to return to Islamabad on Sunday for additional talks.