diff --git a/lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/ConcatenateFunction.java b/lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/ConcatenateFunction.java
deleted file mode 100644
index 08fa8e9ef41..00000000000
--- a/lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/ConcatenateFunction.java
+++ /dev/null
@@ -1,75 +0,0 @@
-package org.apache.lucene.queries.function.valuesource;
-
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-
-import org.apache.lucene.index.AtomicReaderContext;
-import org.apache.lucene.queries.function.FunctionValues;
-import org.apache.lucene.queries.function.ValueSource;
-
-import java.io.IOException;
-import java.util.List;
-import java.util.Map;
-
-/**
- * A {@link ValueSource} implementation which concatenates existing string
- * values from the provided ValueSources into one string.
- */
-public class ConcatenateFunction extends MultiFunction {
-
-  public ConcatenateFunction(List<ValueSource> sources) {
-    super(sources);
-  }
-
-  @Override
-  protected String name() {
-    return "concat";
-  }
-
-  @Override
-  public FunctionValues getValues(Map context, AtomicReaderContext readerContext) throws IOException {
-    return new Values(valsArr(sources, context, readerContext)) {
-
-      @Override
-      public String strVal(int doc) {
-        StringBuilder stringBuilder = new StringBuilder();
-        for (FunctionValues functionValues : valsArr) {
-          if (functionValues.exists(doc)) {
-            stringBuilder.append(functionValues.strVal(doc));
-          }
-        }
-        return stringBuilder.toString();
-      }
-
-      @Override
-      public Object objectVal(int doc) {
-        return strVal(doc);
-      }
-
-      @Override
-      public boolean exists(int doc) {
-        for (FunctionValues vals : valsArr) {
-          if (vals.exists(doc)) {
-            return true;
-          }
-        }
-        return false;
-      }
-    };
-  }
-}
diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index 83a5cc79abd..6687631b590 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -127,9 +127,6 @@ New Features
 * SOLR-1871: The 'map' function query accepts a ValueSource as target and
   default value. (Chris Harris, shalin)
 
-* SOLR-3702: A 'concat' function query to support concatenation of Strings.
-  (Ted Strauss, Andrey Kudryavtsev via shalin)
-
 Bug Fixes
 ----------------------
 
diff --git a/solr/core/src/java/org/apache/solr/search/ValueSourceParser.java b/solr/core/src/java/org/apache/solr/search/ValueSourceParser.java
index 25c52489249..4c6cb941a3b 100644
--- a/solr/core/src/java/org/apache/solr/search/ValueSourceParser.java
+++ b/solr/core/src/java/org/apache/solr/search/ValueSourceParser.java
@@ -779,13 +779,6 @@ public abstract class ValueSourceParser implements NamedListInitializedPlugin {
       }
     });
 
-    addParser("concat", new ValueSourceParser() {
-      @Override
-      public ValueSource parse(FunctionQParser fp) throws SyntaxError {
-        return new ConcatenateFunction(fp.parseValueSourceList());
-      }
-    });
-
   }
 
   private static TInfo parseTerm(FunctionQParser fp) throws SyntaxError {
diff --git a/solr/core/src/test/org/apache/solr/search/function/TestFunctionQuery.java b/solr/core/src/test/org/apache/solr/search/function/TestFunctionQuery.java
index 2dbdde13da1..1ed6dbcf4f3 100644
--- a/solr/core/src/test/org/apache/solr/search/function/TestFunctionQuery.java
+++ b/solr/core/src/test/org/apache/solr/search/function/TestFunctionQuery.java
@@ -754,24 +754,4 @@ public class TestFunctionQuery extends SolrTestCaseJ4 {
     }
   }
 
-  public void testConcatFunction() {
-    clearIndex();
-
-    assertU(adoc("id", "1", "field1_t", "buzz", "field2_t", "word"));
-    assertU(adoc("id", "2", "field1_t", "1", "field2_t", "2","field4_t", "4"));
-    assertU(commit());
-
-    assertQ(req("q","id:1",
-        "fl","field:concat(field1_t,field2_t)"),
-        " //str[@name='field']='buzzword'");
-
-    assertQ(req("q","id:2",
-        "fl","field:concat(field1_t,field2_t, field3_t, field4_t)"),
-        " //str[@name='field']='124'");
-
-    assertQ(req("q","id:1",
-        "fl","field:def(concat(field3_t, field4_t), 'defValue')"),
-        " //str[@name='field']='defValue'");
-  }
-
 }