Let the school know you're thinking of applying — they can share their prerequisites and help you through the process.
It's best to ask — circumstances can change at any time.
1) Council of International Schools (CIS) — The school's website lists "Council of International Schools membership" in its History timeline (noting membership from 2010). This indicates the school is a member of the global CIS community; CIS also operates a separate international accreditation process that schools may undertake to demonstrate alignment with international-school standards.
No school-level awards are listed on 3e International School's website for the past five years (January 1, 2021–January 1, 2026).
3e International School is a non-profit bilingual day school (Nursery through Elementary) founded in August 2005. The school operates a research-based dual-language immersion program that splits each day between English and Mandarin instruction and includes specialist classes (art, music, PE and French at Elementary). The elementary programme notes alignment with the Chinese National Curriculum, American Common Core standards, British language-art approaches and Singapore mathematics practices. The Lido campus houses Nursery–Kindergarten programmes; the school cites interactive scientific exhibits (from the Exploratorium) in its learning spaces and runs a term-by-term After-School Activities programme offering sports, music, arts, academic and cultural classes. 3e reports a student body of over 200 children from more than 20 countries. (Sources: school site pages and school's published tuition page).