Thailand's Prime Minister Paetongtarn Shinawatra has visited the border with Cambodia as she faced resignation calls following a leaked phone call between her and Cambodia's former leader discussing recent border tensions.

Thailand’s Prime Minister Paetongtarn Shinawatra has apologized for the political turbulence set off by a leaked recording of her negotiations with Cambodia’s former leader in the two nations' latest border dispute.

Thai Prime Minister Paetongtarn Shinawatra on Thursday apologised after a phone conversation between her and former Cambodian Prime Minster Hun Sen was leaked.

Thailand's embattled Prime Minister Paetongtarn Shinawatra faced the prospect of losing her government's majority on Friday, as a vital coalition partner looked set to demand her resignation and senators launched a legal bid to remove her from office.

The second biggest party in Thailand's ruling coalition pulled out on Wednesday over a leaked phone call between Prime Minister Paetongtarn Shinawatra and former Cambodian leader Hun Sen, putting her government on the brink of collapse.

Paetongtarn Shinawatra has been widely criticized for appearing weak in a conversation with Cambodia’s Hun Sen, who released a recording of their exchange.

Thai Prime Minister Paetongtarn Shinawatra faced mounting calls Thursday to resign after a leaked phone call she had with former Cambodian leader Hun Sen provoked widespread anger and prompted a key coalition partner to quit.