Afghanistan President Hamid Karzai confirmed on Tuesday in Oslo that he plans to step down next year when his mandate expires.
"The question of me staying as the president beyond 2014 is out of the question," Karzai said when reporters asked about recent speculation that he was keen to stay on.
"Neither am I seeking a third term, nor does the constitution allow it. There will be an election and a new president will come," he said.
Karzai was elected in 2004, and re-elected in 2009 in a vote marred by accusations of fraud.
Afghanistan's next presidential election is scheduled for April 2014, just a few months before the end of NATO's mission.
Karzai has previously said he would not stay in power beyond 2014, including at a meeting with US President Barack Obama last month, amid some concern that he could try to cling to power.
During his visit to Oslo, Norway said it would continue to help the country until 2017, with annual aid of 750 million kroner (101 million euros, $137 million). Afghanistan is one of the poorest countries in the world, and one of the most corrupt.
Prime Minister Jens Stoltenberg said the aid agreement -- which formalizes previously-made pledges -- would depend on Afghan authorities' commitment to "good governance, the rule of law, human rights, transparency and democracy."
"We have zero tolerance for corruption," he stressed, nothing that Oslo had suspended development aid in the past when funds had been misappropriated.
Afghanistan, the second-biggest recipient of Norwegian aid, is ranked as one of the most corruption-riddled countries in the world alongside North Korea and Somalia, according to graft watchdog Transparency International.