The Answer is NO.You cant find any logs for what happened in the past.But if you want to not be in same situation again.Here is the way to do..
--Create a server Audit:
CREATE SERVER AUDIT [SqlAgentObjectAccess_Audit]
TO APPLICATION_LOG
WITH
(QUEUE_DELAY = 1000
,ON_FAILURE = CONTINUE
,AUDIT_GUID = 'e1f7d882-b26e-4b70-bc03-87af197eb7de'
)
--Now start the server Audit
ALTER SERVER AUDIT [SqlAgentObjectAccess_Audit] WITH (STATE = ON)
---now you need to turn on audit in MSDB and state which events to be audited
USE [msdb]
go
CREATE DATABASE AUDIT SPECIFICATION [SqlAgentObjectAccess_Audit_MSDB]
FOR SERVER AUDIT [SqlAgentObjectAccess_Audit]
ADD (EXECUTE ON OBJECT::[dbo].[sp_delete_job] BY [dbo]),
ADD (EXECUTE ON OBJECT::[dbo].[sp_delete_job] BY [SQLAgentUserRole]),
ADD (EXECUTE ON OBJECT::[dbo].[sp_add_job] BY [dbo]),
ADD (EXECUTE ON OBJECT::[dbo].[sp_add_job] BY [SQLAgentUserRole])
WITH (STATE = ON)
GO
Note:
1.You can even login to some share and read those files daily into table and send an email
2.you can audit a list of all the events available HERE
References:
https://blogs.msdn.microsoft.com/sqlagent/2011/02/21/auditing-sql-agent-job-creation-and-deletion/