Constitution of the Republic of Singapore · 2020 Revised Edition · Part 10 · Citizenship
134. Deprivation of citizenship on acquisition of foreign citizenship
Feedback & supportThe Government may, by order, deprive a citizen of Singapore of his citizenship if the Government is satisfied that —
he has, while of or over the age of 18 years, at any time after 6 April 1960 acquired by registration, naturalisation or other voluntary and formal act (other than marriage) the citizenship of any country outside Singapore or having so acquired such citizenship before the age of 18 years continues to retain it after that age; or
the citizen, being a woman who is a citizen of Singapore by registration under Article 123(2), has acquired the citizenship of any country outside Singapore by virtue of her marriage to a person who is not a citizen of Singapore.
Where the Government has made an order under this Article depriving a citizen of Singapore of his citizenship, he shall cease to be a citizen with effect from the date of the order.
citizen of Singapore
“citizen of Singapore” means any person who, under the provisions of this Constitution, has the status of a citizen of Singapore;