Misi ILASA inggih punika ngajuang profesi arsitektur lanskap lan junjung tegeh standar layanan profesional saking anggotane, lan ngawakilin profesi arsitektur lanskap saking hal napi ja sane polih ngaruhin kapentingan anggota institut.
ILASA's mission is to advance the profession of landscape architecture and uphold high standards of professional service to its members, and to represent the profession of landscape architecture in any matter which may affect the interests of the members of the institute.