Level 3 axillary lymph nodes :
Level III axillary lymph nodes are part of Apical axilla. They include the nodes which lies medial to medial margin of pectoralis minor, namely, subclavicular, infraclavicular or apical. The apical lymph nodes drain lymph from anterior, posterior, central and lateral group of axillary lymph nodes. So they are the terminal group of axillary lymph nodes.
Anterior
Posterior
Central
Apical