Suu Kyi said she was not backing down on the issue, however.
"Politics is an issue of give and take," she told reporters. "We are not giving up, we are just yielding to the aspirations of the people."
Suu Kyi and her opposition National League for Democracy party had objected to phrasing in the oath that obligated them to "safeguard the constitution"—a document they have vowed to amend because it was drafted under military rule and ensures the army inordinate power. The party wants "safeguard" replaced with "respect," a change made in other Myanmar laws including electoral legislation that enabled Suu Kyi's party to officially enter politics for the first time in decades.
But their failure to take up their seats had irked some of Suu Kyi's backers, who are eager to see the person who has stood up to Myanmar's military for 23 years finally take her place in the legislature.
The April 1 vote was the first ballot the NLD participated in since 1990—when it won a landslide victory that was promptly annulled by the army.
Suu Kyi said ethnic lawmakers in the ruling-party dominated parliament had appealed on her party to solve the issue from within the assembly.
"We are fulfilling the wishes of the people, because the people want the NLD to enter parliament," Suu Kyi said.