The Thai king's sister, disqualified this week by the Election Commission from running for prime minister, apologized for causing "problems" for the Thai people ahead of next month's election, the country's first since a 2014 coup.
Princess Ubolratana Rajakanya Sirivadhana Barnavadi's comments late on Tuesday came a day after the commission dropped her name from an official list of candidates for prime minister.
The commission said members of the royal family should stay above politics, echoing a sharp rebuke from King Maha Vajiralongkorn that her bid was "inappropriate" and unconstitutional.
"I am sorry my genuine intention to work for the country and Thai people has caused such problems that shouldn't have happened in this era," she said on Instagram after making a public appearance in central Thailand. She ended her statement with the hashtag, "#howcomeitsthewayitis".
Some social media users urged her to serve the people as a member of the royal family, but Ubolratana responded: "I don't want to be in that position anymore. I gave that up a long time ago."
Ubolratana's unprecedented nomination by a party allied with populist ex-premier Thaksin Shinawatra unsettled the Southeast Asian nation, where the monarchy is revered by millions of Thais and remains above politics.