A Study of TAR-200 in Combination With Cetrelimab, TAR-200 Alone, or Cetrelimab Alone in Participants With Non-Muscle Invasive Bladder Cancer (NMIBC) Unresponsive to Intravesical Bacillus Calmette-Guérin Who Are Ineligible for or Elected Not to Undergo Radical Cystectomy

Inclusion Criteria: * Histologically confirmed diagnosis of persistent or recurrent high-risk non-muscle invasive bladder cancer (HR-NMIBC), (carcinoma in situ \[CIS\] or tumor in situ \[Tis\]), with or without papillary disease (T1, high-grade Ta) or papillary disease only (high-grade Ta or any T1 and absence of CIS), within 12 months of completion of the last dose of Bacillus Calmette-Guerin (BCG) therapy, in participants who have received adequate BCG. Mixed histology tumors are allowed if urothelial differentiation (transitional cell histology) is predominant. However, the presence of neuroendocrine, micropapillary, signet ring cell, plasmacytoid, or sarcomatoid features will make a participant ineligible. For participants with lamina propria invasion (T1) on the screening biopsy/ transurethral resection of bladder tumor (TURBT), muscularis propria must be present in order to rule out Muscle Invasive Bladder Cancer (MIBC) * All visible papillary disease must be fully resected (absent) prior to randomization (residual CIS is acceptable for participants eligible for Cohorts 1, 2, and 3 only) and documented in the electronic case report form (eCRF) at screening cystoscopy. For participants with papillary disease only (Cohort 4), local urine cytology at screening must be negative or atypical (for High-Grade Urothelial Carcinoma \[HGUC\]) * Participants must be ineligible for or have elected not to undergo radical cystectomy * BCG-unresponsive high-risk NMIBC after treatment …