Trigger Azure Function with Filtered Document Type from CosmosDB Collection

Can we we trigger an azure function only when certain document with field values inserted into Cosmos DB ? E.G an employee document with country “USA” field value trigger azure function. I couldn’t figure this one out as its always triggering the function whenever there is an item added / modified which makes too much function calls.

Thanks !

Regards,
Sowmyan

Trigger Azure Function with Filtered Document Type from CosmosDB Collection