Iran’s Supreme Leader Ayatollah Ali Khamenei speaks during a meeting in Tehran, Iran, May 20, 2025. Photo: Office of the Iranian Supreme Leader/WANA (West Asia News Agency)/Handout via REUTERS

Iran has denounced the latest nuclear proposal from the United States as “unprofessional and untechnical,” reaffirming the country’s right to enrich uranium and announcing plans to present a counteroffer in the coming days.

“After receiving the American proposal regarding the Iranian nuclear program, we are now preparing a counteroffer,” Ali Shamkhnai, political adviser to Iran’s Supreme Leader Ayatollah Ali Khamenei, said in an interview on Wednesday.

Shamkhnai criticized the White House draft proposal as “not well thought out,” emphasizing its alleged failure to address sanctions relief — a key demand for Tehran under any deal with Washington.

“There is no mention whatsoever of lifting sanctions in the latest American proposal, even though the issue of sanctions is a fundamental matter for Iran,” Shamkhnai said.

The Iranian official also warned that Tehran will not allow the US to dismantle its “peaceful nuclear program” or force uranium enrichment down to zero.

“Iran will never relinquish its natural rights,” Shamkhnai said.

Washington’s draft proposal for a new nuclear deal was delivered by Omani officials — who have been mediating negotiations between Iranian Foreign Minister Abbas Araghchi and US Special Envoy to the Middle East Steve Witkoff — during last month’s talks in Rome.

On Wednesday, Khamenei dismissed such an offer, saying it “contradicts our nation’s belief in self-reliance” and runs counter to Iran’s key objectives.

“The proposal that the Americans have presented is 100 percent against our interests,” the Iranian leader said during a televised speech.

“The rude and arrogant leaders of America repeatedly demand that we should not have a nuclear program. Who are you to decide whether Iran should have enrichment?” Khamenei continued.

After five rounds of talks, diplomatic efforts have yet to yield results as both adversaries clash over Iran’s demand to maintain its domestic uranium enrichment program — a condition the White House has firmly rejected.

In April, Tehran and Washington held their first official nuclear negotiation since the US withdrew from a now-defunct 2015 nuclear deal that had imposed temporary limits on Iran’s nuclear program in exchange for sanctions relief.

Since taking office, US President Donald Trump has sought to curtail Tehran’s potential to develop a nuclear weapon that could spark a regional arms race and pose a threat to Israel.

Meanwhile, Iran seeks to have Western sanctions on its oil-dependent economy lifted, while maintaining its nuclear enrichment program — which the country insists is solely for civilian purposes.

As part of the Trump administration’s “maximum pressure” campaign against Iran — which aims to cut the country’s crude exports to zero and prevent it from obtaining a nuclear weapon — Washington has been targeting Tehran’s oil industry with mounting sanctions.

Amid the ongoing diplomatic deadlock, Israel has declared it will never allow the Islamist regime to acquire nuclear weapons, as the country views Iran’s nuclear program as an existential threat.

However, Israeli Prime Minister Benjamin Netanyahu pledged to uphold any agreement that prevents Tehran from enriching uranium.

“But in any case, Israel maintains the right to defend itself from a regime that is threatening to annihilate it,” Netanyahu said in a press conference last month, following reports that Jerusalem could strike Iranian nuclear sites if ongoing negotiations between Washington and Tehran fail.