SQL Server Replication Agent Permission
OS error 3 means path not found.  You must specify a UNC network share such as \\computername\snapshot rather than a local path when using pull subscriptions and/or a remote Distributor.  This is covered in Secure the Snapshot Folder.  I have also covered this in a blog post found here or here.

Also, ensure your replication agent process account has read permissions on the snapshot share.  This can be done by right-clicking on the snapshot folder -> Properties, and adding the user on the Security tab with Read permissions.

If you have any questions please let me know.