The purpose of this study is to identify the recommended Phase 2 combination dose (RP2CD\[s\]) of the amivantamab and capmatinib combination therapy in participants with non-small cell lung cancer (NSCLC) in Phase 1 (combination dose selection), and to evaluate the antitumor effect of the amivantamab and capmatinib combination therapy in mesenchymal-epithelial transition (MET) exon 14 skipping mutation and MET amplified NSCLC, when administered at the selected RP2CD(s) in Phase 2 (expansion).