Nepal, June 28 -- Thousands of anti-government protesters rallied in Bangkok on Saturday, demanding Prime Minister Paetongtarn Shinawatra resign after a leaked diplomatic phone call stirred public anger over her leadership.

A Cambodian elder statesman leaked a call meant to sooth a border spat between the two nations in which Paetongtarn called him "uncle" and referred to a Thai military commander as her "opponent".

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A key party abandoned Paetongtarn's coalition, accusing the 38-year-old dynastic premier of cow-towing to Cambodia and undermining Thailand's military, leaving her teetering with a slim parliamentary majority.

Around 4,000 demonstrators filled roads ringing the capital's Victory Monument, waving Thai flags...