A Study to Investigate the Efficacy and Safety of Elecoglipron in Asian Participants With Obesity or Overweight With or Without Type 2 Diabetes Mellitus

Inclusion Criteria: * Adult participant aged 18 years or older at the time of informed consent. * Body mass index (BMI) at screening of: * 28 kg/m\^2 or higher, or * 24 kg/m\^2 to less than 28 kg/m\^2 with at least 1 weight-related comorbidity. * Stable body weight (self-reported or documented) for 90 days prior to the screening visit (± 5% body weight change) * History of at least 1 self-reported unsuccessful dietary effort to lose body weight. * Participants with type 2 diabetes mellitus, if enrolled, and have HbA1c from 6.5% to less than 10.0% at screening. Exclusion Criteria: * Any of the following medical history, laboratory values, or complications related to diabetes: * T1DM * HbA1c ≥ 10% (86 mmol/mol) at the screening visit * Currently receiving, or anticipated to receive, therapeutic intervention for diabetic retinopathy and/or macular edema. * Have had more than one episode of severe hypoglycemia within 180 days prior to the screening visit, or has a history of hypoglycemia unawareness or poor recognition of hypoglycemic symptoms. * History of acute (unless due to previously resolved gallstone pancreatitis and post-cholecystectomy) or chronic pancreatitis. * History/family history (first degree biologic relatives) of medullary thyroid cancer or multiple endocrine neoplasia type 2.