rhombomere 3 formation
The process that gives rise to rhombomere 3. This process pertains to the initial formation of a structure from unspecified parts. Rhombomeres are transverse segments of the developing rhombencephalon. Rhombomeres are lineage restricted, express different genes from one another, and adopt different developmental fates. Rhombomeres are numbered in anterior to posterior order.
GO:0021594
rhombomere formation
is_a
GO:0021658
rhombomere 3 morphogenesis
part_of