Database
[{"_id":ObjectId("5f60ffc5aefd067a9ff9345c"),"_class":"com.kalsym.smart.sms.data.MSASMS","number1":NumberLong(923211105469),"numbers2":[{"field1":"20200915532E888","number2":NumberLong(923018565627),"field2":"abcd","datefield":ISODate("2020-10-10T17:54:09.886Z")},{"field1":"2020092570A6948","number2":NumberLong(923018565627),"field2":"efgh","datefield":ISODate("2020-10-06T15:23:04.891Z")},{"field1":"2020092570A6948","number2":NumberLong(923018565627),"field2":"ijkl","datefield":ISODate("2020-10-03T15:23:04.891Z")}],"optInCount":0}]
Query
db.collection.update({},{$pull:{numbers2:{datefield:{$gt:ISODate("2020-10-04T00:00:00.000Z")}}}},{multi:true})