Her country is bracing for elections later this year seen as a vital test of democratic reforms in a nation that was until recently straitjacketed by decades of junta rule.
Suu Kyi's National League for Democracy (NLD) party wants to amend constitutional clauses that block their leader from the presidency and hands a crucial say over changes to the charter to the military, which holds a quarter of parliamentary seats.
But Suu Kyi failed to offer reassurances her party would participate in the polls, as the NLD struggles to amend the charter to allow her to take the top job.
"We are not closing off any options. No one can know what will happen, so we have to calculate for every possibility," she told reporters in the capital Naypyidaw.
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A provision in the current junta-era constitution bars those with a foreign spouse or children from the presidency.
She has received support, including from US president Barack Obama, for her move to change the constitution.
But observers say she has accepted that it is unlikely she will be able to become president immediately after elections, which are slated for November.
The NLD's second constitutional sticking point is the clause giving the army 25 percent of seats in parliament -- a power bloc that hands it an effective veto on charter amendments.
Last year the NLD gained five million signatures -- around 10 percent of the population -- in support of its bid to end the army's effective veto.
But analysts say the military is unlikely to relinquish its seats or the political leverage they bring as Myanmar edges towards democracy.
Suu Kyi said the NLD has proposed a gradual reduction in military lawmakers, but added "if we are going to accept the presence of military representatives in the legislature forever then that's not democracy.