This study will evaluate the safety and tolerability profile of BFKB8488A following subcutaneous (SC) administration in overweight and obese participants (body mass index [BMI] greater than [>] 27 to less than or equal to [](streamdown:incomplete-link)

Inclusion Criteria:

• Participants with BMI >/=30 kg/m^2 and </=40 kg/m^2 or BMI >27 kg/m^2 and <30 kg/m^2 and Homeostatic Model Assessment-Insulin Resistance (HOMA-IR) >3.60 or waist circumference >100 centimeters (cm) (males) or 88 cm (females) or fasting plasma insulin >/=15 milli international unit per liter (mIU/L) or fasting plasma glucose >/=100 milligrams per deciliter (mg/dL) and <126 mg/dL or hemoglobin A1c (HbA1c) >5.6 percent (%) and <6.5%
• Negative pregnancy test

Exclusion Criteria:

• A diagnosis of Type 2 diabetes mellitus at any time
• Pregnant, lactating or intending to become pregnant during the study or within 3 months after the study dose is administered
• Uncontrolled intercurrent illness or any psychiatric illness
• Participants actively involved in a weight loss or dietary program within the last 6 months
• History of surgical procedures for weight loss
• History of eating disorder
• Uncontrolled hypertension (systolic >/=140 millimeter of mercury [mmHg] or diastolic blood pressure >/=90 mmHg) either on or off therapy at screening or Day -2
• Fasting triglycerides >500 mg/dL (5.64 millimoles per liter [mmol/L]) or low density lipoprotein (LDL) >160 mg/dL (4.14 mmol/L) at screening
• Any serious medical condition or abnormality in clinical laboratory tests