We sought to gain insights into the impacts of COVID-19 and associated control measures on health and health care of patients from low- and middle-income countries with cardiovascular disease, diabetes, and mental health conditions, using an online survey during the COVID-19 pandemic. The most common concern for the 1487 patients who took part was contracting COVID-19 when they accessed health care. Of those infected with COVID-19, half said that their health had been worse since being infected. Collectively, most people reported an increase in feelings of stress and loneliness. The COVID-19 pandemic has led to a range of health care impacts on patients with noncommunicable diseases, including constraints on access to care and health effects, particularly mental well-being.