diff --git a/pom.xml b/pom.xml
index 924a4a67..95bb0a19 100644
--- a/pom.xml
+++ b/pom.xml
@@ -90,7 +90,7 @@ under the License.
     <mavenSurefirePluginVersion>${surefire.version}</mavenSurefirePluginVersion>
     <mavenWarPluginVersion>3.3.2</mavenWarPluginVersion>
 
-    <project.build.outputTimestamp>2023-02-06T12:43:51Z</project.build.outputTimestamp>
+    <project.build.outputTimestamp>2023-03-21T14:38:01Z</project.build.outputTimestamp>
   </properties>
 
   <dependencies>
diff --git a/src/main/java/org/apache/maven/plugins/deploy/DeployMojo.java b/src/main/java/org/apache/maven/plugins/deploy/DeployMojo.java
index 1dfb9127..0b2c47ee 100644
--- a/src/main/java/org/apache/maven/plugins/deploy/DeployMojo.java
+++ b/src/main/java/org/apache/maven/plugins/deploy/DeployMojo.java
@@ -126,6 +126,18 @@ public class DeployMojo extends AbstractDeployMojo {
     @Parameter(property = "maven.deploy.skip", defaultValue = "false")
     private String skip = Boolean.FALSE.toString();
 
+    /**
+     * Set this to <code>true</code> to allow incomplete project processing. By default, such projects are forbidden
+     * and Mojo will fail to process them. Incomplete project is a Maven Project that has any other packaging than
+     * "pom" and has no main artifact packaged. In the majority of cases, what user really wants here is a project
+     * with "pom" packaging and some classified artifact attached (typical example is some assembly being packaged
+     * and attached with classifier).
+     *
+     * @since 3.1.1
+     */
+    @Parameter(defaultValue = "false", property = "allowIncompleteProjects")
+    private boolean allowIncompleteProjects;
+
     private enum State {
         SKIPPED,
         DEPLOYED,
@@ -254,9 +266,23 @@ private ArtifactDeployerRequest createDeployerRequest() {
             artifactManager.setPath(pomArtifact, pomPath);
             deployables.add(pomArtifact);
             // main artifact
-            if (!isValidPath.test(artifact) && !attachedArtifacts.isEmpty()) {
-                throw new MojoException("The packaging plugin for this project did not assign "
-                        + "a main file to the project but it has attachments. Change packaging to 'pom'.");
+            if (!isValidPath.test(artifact)) {
+                if (!attachedArtifacts.isEmpty()) {
+                    if (allowIncompleteProjects) {
+                        getLog().warn("");
+                        getLog().warn("The packaging plugin for this project did not assign");
+                        getLog().warn("a main file to the project but it has attachments. Change packaging to 'pom'.");
+                        getLog().warn("");
+                        getLog().warn("Incomplete projects like this will fail in future Maven versions!");
+                        getLog().warn("");
+                    } else {
+                        throw new MojoException("The packaging plugin for this project did not assign "
+                                + "a main file to the project but it has attachments. Change packaging to 'pom'.");
+                    }
+                } else {
+                    throw new MojoException(
+                            "The packaging for this project did not assign a file to the build artifact");
+                }
             }
             deployables.add(artifact);
         } else {