non·at·ten·dance 
/ˌnɑ:nəˈtɛndəns/ noun
/ˌnɑ:nəˈtɛndəns/ noun [noncount] : failure to be at a place or event where you are expected to be
▪ The school district worked on ways to lower the rate of nonattendance among its students.
▪ The school district worked on ways to lower the rate of nonattendance among its students.
