A Study to Assess Efficacy and Safety of Pembrolizumab With or Without Sacituzumab Tirumotecan (MK- 2870) in Adult Participants With Resectable Non Small Cell Lung Cancer (NSCLC) Not Achieving Pathological Complete Response (pCR) (MK-2870-019)

The key inclusion and exclusion criteria include but are not limited to the following: Inclusion Criteria: * Has histological or cytological confirmation of squamous or nonsquamous non-small cell lung cancer (NSCLC), resectable clinical Stage II, IIIA or IIIB (with nodal involvement \[N2\]) per AJCC eighth edition guidelines * Has confirmation that either epidermal growth factor receptor (EGFR)-directed or anaplastic lymphoma kinase (ALK)-directed therapy is not indicated as primary therapy * Is able to undergo surgery based on opinion of investigator after consultation with surgeon * Is able to receive neoadjuvant pembrolizumab and platinum-based doublet chemotherapy * Applies to screening for the adjuvant period only, before randomization: Has not achieved pathological complete response (pCR) at surgery by local review of pathology. * Applies to screening for the adjuvant period only, before randomization: Tumor tissue sample from surgical resection has been provided for determination of programmed cell death ligand 1 (PD-L1) and trophoblast cell surface antigen 2 (TROP2) status by central vendor before randomization into the adjuvant period * Applies to screening for the adjuvant period only, before randomization: Confirmed to be disease-free based on re-baseline radiological assessment as documented by contrast enhanced chest/abdomen/pelvis computed tomography (CT) (or magnetic resonance imaging (MRI)) within 28 days before randomization * Participants who have AEs due …