diff --git a/builtin/providers/azurerm/resource_arm_network_interface_card.go b/builtin/providers/azurerm/resource_arm_network_interface_card.go
index 7450519b1..3c74bc3e0 100644
--- a/builtin/providers/azurerm/resource_arm_network_interface_card.go
+++ b/builtin/providers/azurerm/resource_arm_network_interface_card.go
@@ -172,6 +172,14 @@ func resourceArmNetworkInterfaceCreate(d *schema.ResourceData, meta interface{})
 		properties.NetworkSecurityGroup = &network.SecurityGroup{
 			ID: &nsgId,
 		}
+
+		networkSecurityGroupName, err := parseNetworkSecurityGroupName(nsgId)
+		if err != nil {
+			return err
+		}
+
+		armMutexKV.Lock(networkSecurityGroupName)
+		defer armMutexKV.Unlock(networkSecurityGroupName)
 	}
 
 	dns, hasDns := d.GetOk("dns_servers")
@@ -308,6 +316,17 @@ func resourceArmNetworkInterfaceDelete(d *schema.ResourceData, meta interface{})
 	resGroup := id.ResourceGroup
 	name := id.Path["networkInterfaces"]
 
+	if v, ok := d.GetOk("network_security_group_id"); ok {
+		networkSecurityGroupId := v.(string)
+		networkSecurityGroupName, err := parseNetworkSecurityGroupName(networkSecurityGroupId)
+		if err != nil {
+			return err
+		}
+
+		armMutexKV.Lock(networkSecurityGroupName)
+		defer armMutexKV.Unlock(networkSecurityGroupName)
+	}
+
 	_, err = ifaceClient.Delete(resGroup, name, make(chan struct{}))
 
 	return err
diff --git a/builtin/providers/azurerm/resource_arm_subnet.go b/builtin/providers/azurerm/resource_arm_subnet.go
index c5329b9f8..65df4f447 100644
--- a/builtin/providers/azurerm/resource_arm_subnet.go
+++ b/builtin/providers/azurerm/resource_arm_subnet.go
@@ -89,6 +89,14 @@ func resourceArmSubnetCreate(d *schema.ResourceData, meta interface{}) error {
 		properties.NetworkSecurityGroup = &network.SecurityGroup{
 			ID: &nsgId,
 		}
+
+		networkSecurityGroupName, err := parseNetworkSecurityGroupName(nsgId)
+		if err != nil {
+			return err
+		}
+
+		armMutexKV.Lock(networkSecurityGroupName)
+		defer armMutexKV.Unlock(networkSecurityGroupName)
 	}
 
 	if v, ok := d.GetOk("route_table_id"); ok {
@@ -182,6 +190,17 @@ func resourceArmSubnetDelete(d *schema.ResourceData, meta interface{}) error {
 	name := id.Path["subnets"]
 	vnetName := id.Path["virtualNetworks"]
 
+	if v, ok := d.GetOk("network_security_group_id"); ok {
+		networkSecurityGroupId := v.(string)
+		networkSecurityGroupName, err := parseNetworkSecurityGroupName(networkSecurityGroupId)
+		if err != nil {
+			return err
+		}
+
+		armMutexKV.Lock(networkSecurityGroupName)
+		defer armMutexKV.Unlock(networkSecurityGroupName)
+	}
+
 	armMutexKV.Lock(vnetName)
 	defer armMutexKV.Unlock(vnetName)
 
diff --git a/builtin/providers/azurerm/resource_arm_virtual_network.go b/builtin/providers/azurerm/resource_arm_virtual_network.go
index 5d4ba9a29..217323a6f 100644
--- a/builtin/providers/azurerm/resource_arm_virtual_network.go
+++ b/builtin/providers/azurerm/resource_arm_virtual_network.go
@@ -97,6 +97,21 @@ func resourceArmVirtualNetworkCreate(d *schema.ResourceData, meta interface{}) e
 		Tags: expandTags(tags),
 	}
 
+	networkSecurityGroupNames := make([]string, 0)
+	for _, subnet := range *vnet.VirtualNetworkPropertiesFormat.Subnets {
+		if subnet.NetworkSecurityGroup != nil {
+			nsgName, err := parseNetworkSecurityGroupName(*subnet.NetworkSecurityGroup.ID)
+			if err != nil {
+				return err
+			}
+
+			networkSecurityGroupNames = append(networkSecurityGroupNames, nsgName)
+		}
+	}
+
+	azureRMVirtualNetworkLockNetworkSecurityGroups(&networkSecurityGroupNames)
+	defer azureRMVirtualNetworkUnlockNetworkSecurityGroups(&networkSecurityGroupNames)
+
 	_, err := vnetClient.CreateOrUpdate(resGroup, name, vnet, make(chan struct{}))
 	if err != nil {
 		return err
@@ -182,6 +197,14 @@ func resourceArmVirtualNetworkDelete(d *schema.ResourceData, meta interface{}) e
 	resGroup := id.ResourceGroup
 	name := id.Path["virtualNetworks"]
 
+	nsgNames, err := expandAzureRmVirtualNetworkVirtualNetworkSecurityGroupNames(d)
+	if err != nil {
+		return fmt.Errorf("[ERROR] Error parsing Network Security Group ID's: %+v", err)
+	}
+
+	azureRMVirtualNetworkLockNetworkSecurityGroups(&nsgNames)
+	defer azureRMVirtualNetworkUnlockNetworkSecurityGroups(&nsgNames)
+
 	_, err = vnetClient.Delete(resGroup, name, make(chan struct{}))
 
 	return err
@@ -245,3 +268,40 @@ func resourceAzureSubnetHash(v interface{}) int {
 	}
 	return hashcode.String(subnet)
 }
+
+func expandAzureRmVirtualNetworkVirtualNetworkSecurityGroupNames(d *schema.ResourceData) ([]string, error) {
+	nsgNames := make([]string, 0)
+
+	if v, ok := d.GetOk("subnet"); ok {
+		subnets := v.(*schema.Set).List()
+		for _, subnet := range subnets {
+			subnet, ok := subnet.(map[string]interface{})
+			if !ok {
+				return nil, fmt.Errorf("[ERROR] Subnet should be a Hash - was '%+v'", subnet)
+			}
+
+			networkSecurityGroupId := subnet["security_group"].(string)
+			if networkSecurityGroupId != "" {
+				nsgName, err := parseNetworkSecurityGroupName(networkSecurityGroupId)
+				if err != nil {
+					return nil, err
+				}
+
+				nsgNames = append(nsgNames, nsgName)
+			}
+		}
+	}
+
+	return nsgNames, nil
+}
+
+func azureRMVirtualNetworkUnlockNetworkSecurityGroups(networkSecurityGroupNames *[]string) {
+	for _, networkSecurityGroupName := range *networkSecurityGroupNames {
+		armMutexKV.Unlock(networkSecurityGroupName)
+	}
+}
+func azureRMVirtualNetworkLockNetworkSecurityGroups(networkSecurityGroupNames *[]string) {
+	for _, networkSecurityGroupName := range *networkSecurityGroupNames {
+		armMutexKV.Lock(networkSecurityGroupName)
+	}
+}
diff --git a/builtin/providers/azurerm/resourceid.go b/builtin/providers/azurerm/resourceid.go
index b05f4d75f..f981b410b 100644
--- a/builtin/providers/azurerm/resourceid.go
+++ b/builtin/providers/azurerm/resourceid.go
@@ -95,3 +95,12 @@ func parseAzureResourceID(id string) (*ResourceID, error) {
 
 	return idObj, nil
 }
+
+func parseNetworkSecurityGroupName(networkSecurityGroupId string) (string, error) {
+	id, err := parseAzureResourceID(networkSecurityGroupId)
+	if err != nil {
+		return "", fmt.Errorf("[ERROR] Unable to Parse Network Security Group ID '%s': %+v", networkSecurityGroupId, err)
+	}
+
+	return id.Path["networkSecurityGroups"], nil
+}