ISO/IEC/IEEE 29119 is a series of five international standards for software testing. First developed in 2007 and released in 2013, the standards are defined for testing that be used within any software development lifecycle.
The 5 standards are
ISO/IEC 29119-1:2013 - Concepts & Definitions
ISO/IEC 29119-2:2013 - Test Processes
ISO/IEC 29119-3:2013 - Test Documentation
ISO/IEC 29119-4:2015 - Test Techniques
ISO/IEC 29119-5:2016 - Keyword Driven Testing