The International Covenant on Civil and Political Rights, ratified by 175 countries, protects the right to life.
Mr Malema vowed to challenge the verdict even up to South Africa’s highest court.
On Tuesday, South Korea’s suspended President Yoon Suk Yeol appeared for the first time at the Constitutional Court for his impeachment trial.
This marks the first time in the country’s history that a sitting president of South Korea has been arrested.
Since New Year’s Day, numerous supporters of Mr Yoon have been protesting against his arrest in front of the impeached president’s official residence and have blocked access.
Protesters and opposition leaders have accused the president of undermining democratic principles.
Similar rallies took place in several other Indonesian cities.
The South African apex court barred Mr Zuma from running for parliament seat days before the country’s election on Monday.
“This decree has surprised and shocked all republicans,” said Boubacar Toure, vice-president of the Rally for Mali (RPM) party of ousted President Ibrahim Boubacar Keita.
“An inexplicable slowness has been noted. Nothing has been done despite developments over the past week,” the 15 candidates said.
