Any process that stops, prevents or reduces the frequency, rate or extent of intralumenal vesicle formation.
Synonyms:
exact_synonym:
down regulation of endosome membrane budding; down regulation of intralumenal vesicle formation; downregulation of endosome membrane budding; downregulation of intralumenal vesicle formation; negative regulation of endosome membrane budding
narrow_synonym:
inhibition of endosome membrane budding; inhibition of intralumenal vesicle formation