RecruitingPhase 2Drug trialNeoadjuvant Treatment With Atezolizumab and Atezolizumab as Maintenance for the Treatment of Stage III Non Small-Cell Lung Cancer (NSCLC)This is an open-label, phase II, multi-centre clinical trial. 97 Patients with stage IIIA and IIIB non-small cell lung cancer will be enrolled. The treatment is Atezolizumab + Paclitaxel + Carboplatin 3 cycles as neoadjuvant/induction treatment. After the induction treatment every patient will be evaluated by a multidisciplinary team in each participant hospital to decide if the patient is candidate for surgery or not. Depending on the decision each patient will be treated in a different way. The primary objective is to evaluate the Progression free survival (PFS). The total trial duration will be 10 years approximately. Patient accrual is expected to be completed within 2 years. Two years of treatment, 5 years of follow up, and 4-6 months of close-out.