Tuvalu, with a population of about 11,200 spread across nine islands, is one of three remaining Pacific allies of Taiwan after Nauru cut ties and switched to Beijing, which had promised more development help.
Natano had pledged to continue supporting Taiwan, a diplomatic ally since 1979.
Congratulations to Tuvalu on a successful election - we look forward to working with the new Government. — Senator Penny Wong (@SenatorWong) Australia and Tuvalu are longstanding friends, sharing an interest in building a stronger, more resilient and more peaceful Pacific. pic.twitter.com/uz5amcgFUyJanuary 27, 2024
Another leadership contender, Seve Paeniu, has said diplomatic ties should be reviewed, with the new government deciding whether Taiwan or China can best respond to Tuvalu's needs.
Results for the electorate of Funafuti released on Saturday on Tuvalu TV showed Natano did not retain his seat.
He could not immediately be reached for comment.
Paeniu was returned unopposed in the Nukulaelae island electorate and said he would seek to form a coalition among elected MPs to run for prime minister.
Official results showed another leadership contender, Enele Sopoaga, also retained his seat.
Sopoaga has pledged support for Taiwan but wants a security deal with Australia scrapped.
Penny Wong said on Saturday Australia looked forward to working with the new Tuvalu government.
"Australia and Tuvalu are longstanding friends, sharing an interest in building a stronger, more resilient, and more peaceful Pacific," the Foreign Minister said in a statement on social media.
There are no political parties in Tuvalu's parliament, where two MPs are elected in each of the eight island electorates.
The diplomatic tussle between Taiwan and China comes amid a wider contest for influence in the Pacific between China and the US, with Washington recently pledging the first submarine cable to connect Tuvalu to global telecommunications.
Paeniu told Reuters on Saturday the issue of diplomatic recognition of Taiwan or China should be debated by the new government.
Tuvalu's parliament is made up of two MPs from each of the eight island electorates. (AP PHOTO)
"Our last government under Prime Minister Natano had extensive internal discussions about it upon the commencement of our term in government to determine our policy stance on it, so undoubtedly the new government would need to look at the matter and decide its policy position accordingly," he said.
Tuvalu's election commissioner, Tufoua Panapa, said on Friday night after polling booths closed that the new MPs would meet during the week to vote for a prime minister, at a time notified by the governor-general.
"We will have a clearer picture by next week - as we need to bring elect-MPs to the capital island, from the outer islands," he said.
The boat journey can take up to 27 hours.
Natano signed a wide-ranging security and migration deal with Australia in November that allows Canberra to vet Tuvalu's security ties with other nations as well as port and telecommunications projects in return for a defence guarantee and allowing citizens threatened by rising seas to migrate.
The deal was seen as an effort to curb China's rising influence as an infrastructure provider in the Pacific Islands but was criticised by some Tuvalu MPs.
Sopoaga has said he wants the Australian deal scrapped because it infringed on Tuvalu's sovereignty.
He did not immediately respond to a request for comment on Saturday.
Paeniu said he would keep the agreement with Australia.
Former foreign minister Simon Kofe, who attracted global headlines in 2021 when he delivered a speech to the United Nations climate change summit standing knee-deep in water to highlight the plight of the low-lying nation, has retained his seat in parliament for Funafuti.
with AP