The patient is a resident of New Braunfels who is in their 50s and is self-isolating at home.
Nine additional recoveries were confirmed, including three who were previously hospitalized.
In total the county has reported 78 recoveries, seven deaths and 15 active cases, four of which remain hospitalized.
Guadalupe County has not reported any new cases since May 29, when it confirmed its 139th case.
The city also announced June 1 that the local drive-thru COVID-19 testing center will now be managed by the New Braunfels Fire Department with appointments arranged by the New Braunfels Office of Public Health.
The center was established by local physicians, and appointments were previously coordinated by volunteer nurses.
“We appreciate the volunteers who helped provide an opportunity for COVID-19 testing for those who otherwise did not have the ability to get it,” said Cheryl Fraser, Comal County's director of public health, in a press release.
Appointments and management will be run by the county, and residents should call the county’s COVID-19 hotline at 830-221-1120 to schedule an appointment.
The New Braunfels Fire Department will continue to collect samples, and county health authority Dr. Dorothy Overman will continue to be the physician of record for patients without a doctor to authorize the test.
“We look forward to continuing [the center’s] work and continuing to test as many people as possible so we can get an accurate picture of the spread of coronavirus in our community,” Fraser said.